USN-4887-1: Linux kernel vulnerabilities

Published Mar 23, 2021
·
Updated

De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. (CVE-2021-3444) Adam Nichols discovered that heap overflows existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-27365) Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27171) Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly apply speculative execution limits on some pointer types. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2020-27170) Adam Nichols discovered that the iSCSI subsystem in the Linux kernel did not properly restrict access to iSCSI transport handles. A local attacker could use this to cause a denial of service or expose sensitive information (kernel pointer addresses). (CVE-2021-27363) Adam Nichols discovered that an out-of-bounds read existed in the iSCSI subsystem in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information (kernel memory). (CVE-2021-27364)

Affected Software

188 affected componentsFixes available
All of the following
ubuntu/linux-image-5.8.0-1019-raspi<5.8.0-1019.22
5.8.0-1019.22
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1019-raspi-nolpae<5.8.0-1019.22
5.8.0-1019.22
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1022-kvm<5.8.0-1022.24
5.8.0-1022.24
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1024-oracle<5.8.0-1024.25
5.8.0-1024.25
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1026-azure<5.8.0-1026.28
5.8.0-1026.28
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1026-gcp<5.8.0-1026.27
5.8.0-1026.27
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-1027-aws<5.8.0-1027.29
5.8.0-1027.29
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-48-generic<5.8.0-48.54
5.8.0-48.54
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-48-generic-64k<5.8.0-48.54
5.8.0-48.54
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-48-generic-lpae<5.8.0-48.54
5.8.0-48.54
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.8.0-48-lowlatency<5.8.0-48.54
5.8.0-48.54
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-aws<5.8.0.1027.29
5.8.0.1027.29
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-azure<5.8.0.1026.26
5.8.0.1026.26
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-gcp<5.8.0.1026.26
5.8.0.1026.26
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic<5.8.0.48.53
5.8.0.48.53
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic-64k<5.8.0.48.53
5.8.0.48.53
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-generic-lpae<5.8.0.48.53
5.8.0.48.53
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-gke<5.8.0.1026.26
5.8.0.1026.26
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-kvm<5.8.0.1022.24
5.8.0.1022.24
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-lowlatency<5.8.0.48.53
5.8.0.48.53
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-oem-20.04<5.8.0.48.53
5.8.0.48.53
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-oracle<5.8.0.1024.23
5.8.0.1024.23
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-raspi<5.8.0.1019.22
5.8.0.1019.22
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-raspi-nolpae<5.8.0.1019.22
5.8.0.1019.22
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-virtual<5.8.0.48.53
5.8.0.48.53
Ubuntu Ubuntu=20.10
All of the following
ubuntu/linux-image-5.10.0-1019-oem<5.10.0-1019.20
5.10.0-1019.20
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1012-gkeop<5.4.0-1012.13
5.4.0-1012.13
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1032-raspi<5.4.0-1032.35
5.4.0-1032.35
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1036-kvm<5.4.0-1036.37
5.4.0-1036.37
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1040-gcp<5.4.0-1040.43
5.4.0-1040.43
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1041-aws<5.4.0-1041.43
5.4.0-1041.43
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1041-oracle<5.4.0-1041.44
5.4.0-1041.44
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-1043-azure<5.4.0-1043.45
5.4.0-1043.45
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-70-generic<5.4.0-70.78
5.4.0-70.78
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-70-generic-lpae<5.4.0-70.78
5.4.0-70.78
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.4.0-70-lowlatency<5.4.0-70.78
5.4.0-70.78
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.6.0-1052-oem<5.6.0-1052.56
5.6.0-1052.56
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-48-generic<5.8.0-48.54~20.04.1
5.8.0-48.54~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-48-generic-64k<5.8.0-48.54~20.04.1
5.8.0-48.54~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-48-generic-lpae<5.8.0-48.54~20.04.1
5.8.0-48.54~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.8.0-48-lowlatency<5.8.0-48.54~20.04.1
5.8.0-48.54~20.04.1
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-aws<5.4.0.1041.42
5.4.0.1041.42
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-azure<5.4.0.1043.41
5.4.0.1043.41
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-gcp<5.4.0.1040.49
5.4.0.1040.49
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic<5.4.0.70.73
5.4.0.70.73
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-64k-hwe-20.04<5.8.0.48.54~20.04.32
5.8.0.48.54~20.04.32
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-hwe-20.04<5.8.0.48.54~20.04.32
5.8.0.48.54~20.04.32
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-lpae<5.4.0.70.73
5.4.0.70.73
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-20.04<5.8.0.48.54~20.04.32
5.8.0.48.54~20.04.32
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-gkeop<5.4.0.1012.15
5.4.0.1012.15
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-gkeop-5.4<5.4.0.1012.15
5.4.0.1012.15
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-kvm<5.4.0.1036.34
5.4.0.1036.34
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-lowlatency<5.4.0.70.73
5.4.0.70.73
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-lowlatency-hwe-20.04<5.8.0.48.54~20.04.32
5.8.0.48.54~20.04.32
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem<5.4.0.70.73
5.4.0.70.73
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem-20.04<5.6.0.1052.48
5.6.0.1052.48
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem-20.04b<5.10.0.1019.20
5.10.0.1019.20
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oem-osp1<5.4.0.70.73
5.4.0.70.73
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-oracle<5.4.0.1041.38
5.4.0.1041.38
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-raspi<5.4.0.1032.67
5.4.0.1032.67
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-raspi2<5.4.0.1032.67
5.4.0.1032.67
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-virtual<5.4.0.70.73
5.4.0.70.73
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-virtual-hwe-20.04<5.8.0.48.54~20.04.32
5.8.0.48.54~20.04.32
Ubuntu Ubuntu=20.04
All of the following
ubuntu/linux-image-5.3.0-1038-raspi2<5.3.0-1038.40
5.3.0-1038.40
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-1041-gke<5.3.0-1041.44
5.3.0-1041.44
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-72-generic<5.3.0-72.68
5.3.0-72.68
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.3.0-72-lowlatency<5.3.0-72.68
5.3.0-72.68
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1012-gkeop<5.4.0-1012.13~18.04.1
5.4.0-1012.13~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1032-raspi<5.4.0-1032.35~18.04.1
5.4.0-1032.35~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1039-gke<5.4.0-1039.41~18.04.1
5.4.0-1039.41~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1040-gcp<5.4.0-1040.43~18.04.1
5.4.0-1040.43~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1041-aws<5.4.0-1041.43~18.04.1
5.4.0-1041.43~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1041-oracle<5.4.0-1041.44~18.04.1
5.4.0-1041.44~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-1043-azure<5.4.0-1043.45~18.04.1
5.4.0-1043.45~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-70-generic<5.4.0-70.78~18.04.1
5.4.0-70.78~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-70-generic-lpae<5.4.0-70.78~18.04.1
5.4.0-70.78~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-5.4.0-70-lowlatency<5.4.0-70.78~18.04.1
5.4.0-70.78~18.04.1
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-aws<5.4.0.1041.24
5.4.0.1041.24
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-azure<5.4.0.1043.23
5.4.0.1043.23
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gcp<5.4.0.1040.27
5.4.0.1040.27
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-hwe-18.04<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-generic-lpae-hwe-18.04<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gke-5.3<5.3.0.1041.24
5.3.0.1041.24
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gke-5.4<5.4.0.1039.41~18.04.6
5.4.0.1039.41~18.04.6
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gkeop-5.3<5.3.0.72.129
5.3.0.72.129
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-gkeop-5.4<5.4.0.1012.13~18.04.13
5.4.0.1012.13~18.04.13
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-lowlatency-hwe-18.04<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-oem<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-oem-osp1<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-oracle<5.4.0.1041.44~18.04.23
5.4.0.1041.44~18.04.23
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-raspi-hwe-18.04<5.4.0.1032.34
5.4.0.1032.34
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-raspi2-hwe-18.04<5.3.0.1038.27
5.3.0.1038.27
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-snapdragon-hwe-18.04<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04
All of the following
ubuntu/linux-image-virtual-hwe-18.04<5.4.0.70.78~18.04.63
5.4.0.70.78~18.04.63
Ubuntu Ubuntu=18.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1019-raspi to a version that resolves this vulnerability.

    Fixed in 5.8.0-1019.22
  2. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1019-raspi-nolpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-1019.22
  3. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1022-kvm to a version that resolves this vulnerability.

    Fixed in 5.8.0-1022.24
  4. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1024-oracle to a version that resolves this vulnerability.

    Fixed in 5.8.0-1024.25
  5. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1026-azure to a version that resolves this vulnerability.

    Fixed in 5.8.0-1026.28
  6. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1026-gcp to a version that resolves this vulnerability.

    Fixed in 5.8.0-1026.27
  7. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-1027-aws to a version that resolves this vulnerability.

    Fixed in 5.8.0-1027.29
  8. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54
  9. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54
  10. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54
  11. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54
  12. Upgrade

    Upgrade ubuntu/linux-image-aws to a version that resolves this vulnerability.

    Fixed in 5.8.0.1027.29
  13. Upgrade

    Upgrade ubuntu/linux-image-azure to a version that resolves this vulnerability.

    Fixed in 5.8.0.1026.26
  14. Upgrade

    Upgrade ubuntu/linux-image-gcp to a version that resolves this vulnerability.

    Fixed in 5.8.0.1026.26
  15. Upgrade

    Upgrade ubuntu/linux-image-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.53
  16. Upgrade

    Upgrade ubuntu/linux-image-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.53
  17. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.53
  18. Upgrade

    Upgrade ubuntu/linux-image-gke to a version that resolves this vulnerability.

    Fixed in 5.8.0.1026.26
  19. Upgrade

    Upgrade ubuntu/linux-image-kvm to a version that resolves this vulnerability.

    Fixed in 5.8.0.1022.24
  20. Upgrade

    Upgrade ubuntu/linux-image-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.53
  21. Upgrade

    Upgrade ubuntu/linux-image-oem-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.53
  22. Upgrade

    Upgrade ubuntu/linux-image-oracle to a version that resolves this vulnerability.

    Fixed in 5.8.0.1024.23
  23. Upgrade

    Upgrade ubuntu/linux-image-raspi to a version that resolves this vulnerability.

    Fixed in 5.8.0.1019.22
  24. Upgrade

    Upgrade ubuntu/linux-image-raspi-nolpae to a version that resolves this vulnerability.

    Fixed in 5.8.0.1019.22
  25. Upgrade

    Upgrade ubuntu/linux-image-virtual to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.53
  26. Upgrade

    Upgrade ubuntu/linux-image-5.10.0-1019-oem to a version that resolves this vulnerability.

    Fixed in 5.10.0-1019.20
  27. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1012-gkeop to a version that resolves this vulnerability.

    Fixed in 5.4.0-1012.13
  28. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1032-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1032.35
  29. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1036-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1036.37
  30. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1040-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1040.43
  31. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1041-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1041.43
  32. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1041-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1041.44
  33. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1043-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1043.45
  34. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-70-generic to a version that resolves this vulnerability.

    Fixed in 5.4.0-70.78
  35. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-70-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.4.0-70.78
  36. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-70-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.4.0-70.78
  37. Upgrade

    Upgrade ubuntu/linux-image-5.6.0-1052-oem to a version that resolves this vulnerability.

    Fixed in 5.6.0-1052.56
  38. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-generic to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54~20.04.1
  39. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-generic-64k to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54~20.04.1
  40. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54~20.04.1
  41. Upgrade

    Upgrade ubuntu/linux-image-5.8.0-48-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.8.0-48.54~20.04.1
  42. Upgrade

    Upgrade ubuntu/linux-image-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0.1041.42
  43. Upgrade

    Upgrade ubuntu/linux-image-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0.1043.41
  44. Upgrade

    Upgrade ubuntu/linux-image-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0.1040.49
  45. Upgrade

    Upgrade ubuntu/linux-image-generic to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.73
  46. Upgrade

    Upgrade ubuntu/linux-image-generic-64k-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.54~20.04.32
  47. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.54~20.04.32
  48. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.73
  49. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.54~20.04.32
  50. Upgrade

    Upgrade ubuntu/linux-image-gkeop to a version that resolves this vulnerability.

    Fixed in 5.4.0.1012.15
  51. Upgrade

    Upgrade ubuntu/linux-image-gkeop-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1012.15
  52. Upgrade

    Upgrade ubuntu/linux-image-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0.1036.34
  53. Upgrade

    Upgrade ubuntu/linux-image-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.73
  54. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.54~20.04.32
  55. Upgrade

    Upgrade ubuntu/linux-image-oem to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.73
  56. Upgrade

    Upgrade ubuntu/linux-image-oem-20.04 to a version that resolves this vulnerability.

    Fixed in 5.6.0.1052.48
  57. Upgrade

    Upgrade ubuntu/linux-image-oem-20.04b to a version that resolves this vulnerability.

    Fixed in 5.10.0.1019.20
  58. Upgrade

    Upgrade ubuntu/linux-image-oem-osp1 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.73
  59. Upgrade

    Upgrade ubuntu/linux-image-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0.1041.38
  60. Upgrade

    Upgrade ubuntu/linux-image-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0.1032.67
  61. Upgrade

    Upgrade ubuntu/linux-image-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1032.67
  62. Upgrade

    Upgrade ubuntu/linux-image-virtual to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.73
  63. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-20.04 to a version that resolves this vulnerability.

    Fixed in 5.8.0.48.54~20.04.32
  64. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1038-raspi2 to a version that resolves this vulnerability.

    Fixed in 5.3.0-1038.40
  65. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-1041-gke to a version that resolves this vulnerability.

    Fixed in 5.3.0-1041.44
  66. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-72-generic to a version that resolves this vulnerability.

    Fixed in 5.3.0-72.68
  67. Upgrade

    Upgrade ubuntu/linux-image-5.3.0-72-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.3.0-72.68
  68. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1012-gkeop to a version that resolves this vulnerability.

    Fixed in 5.4.0-1012.13~18.04.1
  69. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1032-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1032.35~18.04.1
  70. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1039-gke to a version that resolves this vulnerability.

    Fixed in 5.4.0-1039.41~18.04.1
  71. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1040-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1040.43~18.04.1
  72. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1041-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1041.43~18.04.1
  73. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1041-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1041.44~18.04.1
  74. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-1043-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1043.45~18.04.1
  75. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-70-generic to a version that resolves this vulnerability.

    Fixed in 5.4.0-70.78~18.04.1
  76. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-70-generic-lpae to a version that resolves this vulnerability.

    Fixed in 5.4.0-70.78~18.04.1
  77. Upgrade

    Upgrade ubuntu/linux-image-5.4.0-70-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.4.0-70.78~18.04.1
  78. Upgrade

    Upgrade ubuntu/linux-image-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0.1041.24
  79. Upgrade

    Upgrade ubuntu/linux-image-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0.1043.23
  80. Upgrade

    Upgrade ubuntu/linux-image-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0.1040.27
  81. Upgrade

    Upgrade ubuntu/linux-image-generic-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  82. Upgrade

    Upgrade ubuntu/linux-image-generic-lpae-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  83. Upgrade

    Upgrade ubuntu/linux-image-gke-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0.1041.24
  84. Upgrade

    Upgrade ubuntu/linux-image-gke-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1039.41~18.04.6
  85. Upgrade

    Upgrade ubuntu/linux-image-gkeop-5.3 to a version that resolves this vulnerability.

    Fixed in 5.3.0.72.129
  86. Upgrade

    Upgrade ubuntu/linux-image-gkeop-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1012.13~18.04.13
  87. Upgrade

    Upgrade ubuntu/linux-image-lowlatency-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  88. Upgrade

    Upgrade ubuntu/linux-image-oem to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  89. Upgrade

    Upgrade ubuntu/linux-image-oem-osp1 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  90. Upgrade

    Upgrade ubuntu/linux-image-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0.1041.44~18.04.23
  91. Upgrade

    Upgrade ubuntu/linux-image-raspi-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.1032.34
  92. Upgrade

    Upgrade ubuntu/linux-image-raspi2-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.3.0.1038.27
  93. Upgrade

    Upgrade ubuntu/linux-image-snapdragon-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  94. Upgrade

    Upgrade ubuntu/linux-image-virtual-hwe-18.04 to a version that resolves this vulnerability.

    Fixed in 5.4.0.70.78~18.04.63
  95. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch USN-4887-1

Event History

Mar 23, 2021
Advisory Published
via Ubuntu·12:00 AM
Data Sourced
via Ubuntu·12:00 AM
DescriptionAffected Software

Child vulnerabilities

Contains the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of USN-4887-1?

USN-4887-1 is classified as a medium severity vulnerability affecting the BPF verifier in the Linux kernel.

2

How do I fix USN-4887-1?

To fix USN-4887-1, upgrade to the patched kernel version provided in the advisory.

3

Which systems are affected by USN-4887-1?

USN-4887-1 affects Ubuntu 20.10 with specific kernel versions listed in the advisory.

4

What are the risks associated with USN-4887-1?

The risks include potential exposure of sensitive kernel memory to local attackers.

5

Who discovered the vulnerability addressed in USN-4887-1?

The vulnerability in USN-4887-1 was discovered by De4dCr0w of 360 Alpha Lab.

Company

Resources

Contact

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