CVE-2022-22942: Use After Free

Published Jan 25, 2022
·
Updated

A failing usercopy of the fencerep object will lead to a stale entry in the file descriptor table as putunusedfd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios.

Other sources

A use-after-free flaw was found in the Linux kernel’s vmwexecbufcopyfenceuser function in drivers/gpu/drm/vmwgfx/vmwgfxexecbuf.c in vmwgfx. This flaw allows a local attacker with user privileges to cause a privilege escalation problem.

The vmwgfx driver contains a local privilege escalation vulnerability that allows unprivileged users to gain access to files opened by other processes on the system through a dangling 'file' pointer.

— Launchpad

Affected Software

112 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1160.59.1.rt56.1200.el7
0:3.10.0-1160.59.1.rt56.1200.el7
redhat/kernel<0:3.10.0-1160.59.1.el7
0:3.10.0-1160.59.1.el7
redhat/kernel<0:3.10.0-957.92.1.el7
0:3.10.0-957.92.1.el7
redhat/kernel<0:3.10.0-1062.66.1.el7
0:3.10.0-1062.66.1.el7
redhat/kernel-rt<0:4.18.0-348.20.1.rt7.150.el8_5
0:4.18.0-348.20.1.rt7.150.el8_5
redhat/kernel<0:4.18.0-348.20.1.el8_5
0:4.18.0-348.20.1.el8_5
redhat/kernel<0:4.18.0-147.64.1.el8_1
0:4.18.0-147.64.1.el8_1
redhat/kernel-rt<0:4.18.0-193.79.1.rt13.129.el8_2
0:4.18.0-193.79.1.rt13.129.el8_2
redhat/kernel<0:4.18.0-193.79.1.el8_2
0:4.18.0-193.79.1.el8_2
redhat/kernel-rt<0:4.18.0-305.40.1.rt7.112.el8_4
0:4.18.0-305.40.1.rt7.112.el8_4
redhat/kernel<0:4.18.0-305.40.1.el8_4
0:4.18.0-305.40.1.el8_4
redhat/redhat-virtualization-host<0:4.3.22-20220330.1.el7_9
0:4.3.22-20220330.1.el7_9
VMware Photon OS=3.0
VMware Photon OS=4.0
redhat/kernel<5.16
5.16
debian/linux<5.15.15-2
5.15.15-2
debian/linux<5.15.15-2
5.15.15-2
debian/linux<5.15.15-2
5.15.15-2
ubuntu/linux-azure<4.15.0-1131.144~14.04.1
4.15.0-1131.144~14.04.1
ubuntu/linux-aws-hwe<4.15.0-1120.128~16.04.1
4.15.0-1120.128~16.04.1
ubuntu/linux-azure<4.15.0-1131.144~16.04.1
4.15.0-1131.144~16.04.1
ubuntu/linux-gcp<4.15.0-1116.130~16.04.1
4.15.0-1116.130~16.04.1
ubuntu/linux-hwe<4.15.0-169.177~16.04.1
4.15.0-169.177~16.04.1
ubuntu/linux-oracle<4.15.0-1087.95~16.04.1
4.15.0-1087.95~16.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux<4.15.0-169.177
4.15.0-169.177
ubuntu/linux-aws<4.15.0-1121.129
4.15.0-1121.129
ubuntu/linux-aws-5.4<5.4.0-1066.69~18.04.1
5.4.0-1066.69~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1131.144
4.15.0-1131.144
ubuntu/linux-azure-5.4<5.4.0-1070.73~18.04.1
5.4.0-1070.73~18.04.1
ubuntu/linux-dell300x<4.15.0-1035.40
4.15.0-1035.40
ubuntu/linux-gcp-4.15<4.15.0-1116.130
4.15.0-1116.130
ubuntu/linux-gcp-5.4<5.4.0-1065.69~18.04.1
5.4.0-1065.69~18.04.1
ubuntu/linux-gke-5.4<5.4.0-1063.66~18.04.1
5.4.0-1063.66~18.04.1
ubuntu/linux-gkeop-5.4<5.4.0-1034.35~18.04.1
5.4.0-1034.35~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-100.113~18.04.1
5.4.0-100.113~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1015.16~18.04.1
5.4.0-1015.16~18.04.1
ubuntu/linux-kvm<4.15.0-1107.109
4.15.0-1107.109
ubuntu/linux-oracle<4.15.0-1087.95
4.15.0-1087.95
ubuntu/linux-oracle-5.4<5.4.0-1064.68~18.04.1
5.4.0-1064.68~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1053.60~18.04.1
5.4.0-1053.60~18.04.1
ubuntu/linux-raspi2<4.15.0-1103.110
4.15.0-1103.110
ubuntu/linux-snapdragon<4.15.0-1120.129
4.15.0-1120.129
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gke-4.15*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2061.63
4.15.0-2061.63
ubuntu/linux-azure-fips<4.15.0-2043.47
4.15.0-2043.47
ubuntu/linux-fips<4.15.0-1078.87
4.15.0-1078.87
ubuntu/linux-gcp-fips<4.15.0-2026.28
4.15.0-2026.28
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-100.113
5.4.0-100.113
ubuntu/linux-aws<5.4.0-1066.69
5.4.0-1066.69
ubuntu/linux-aws-5.13<5.13.0-1014.15~20.04.1
5.13.0-1014.15~20.04.1
ubuntu/linux-azure<5.4.0-1070.73
5.4.0-1070.73
ubuntu/linux-azure-5.13<5.13.0-1014.16~20.04.1
5.13.0-1014.16~20.04.1
ubuntu/linux-bluefield<5.4.0-1028.31
5.4.0-1028.31
ubuntu/linux-gcp<5.4.0-1065.69
5.4.0-1065.69
ubuntu/linux-gcp-5.13<5.13.0-1015.18~20.04.1
5.13.0-1015.18~20.04.1
ubuntu/linux-gke<5.4.0-1063.66
5.4.0-1063.66
ubuntu/linux-gkeop<5.4.0-1034.35
5.4.0-1034.35
ubuntu/linux-hwe-5.13<5.13.0-30.33~20.04.1
5.13.0-30.33~20.04.1
ubuntu/linux-ibm<5.4.0-1015.16
5.4.0-1015.16
ubuntu/linux-intel-5.13<5.13.0-1010.10
5.13.0-1010.10
ubuntu/linux-kvm<5.4.0-1056.58
5.4.0-1056.58
ubuntu/linux-oem-5.14<5.14.0-1022.24
5.14.0-1022.24
ubuntu/linux-oracle<5.4.0-1064.68
5.4.0-1064.68
ubuntu/linux-oracle-5.13<5.13.0-1018.22~20.04.1
5.13.0-1018.22~20.04.1
ubuntu/linux-raspi<5.4.0-1053.60
5.4.0-1053.60
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.8*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.8*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.8*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1069.73+fips2
5.4.0-1069.73+fips2
ubuntu/linux-azure-fips<5.4.0-1073.76+fips1
5.4.0-1073.76+fips1
ubuntu/linux-fips<5.4.0-1043.49
5.4.0-1043.49
ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1
5.4.0-1067.71~20.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-realtime*
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.59.1.rt56.1200.el7
  2. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.59.1.el7
  3. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-957.92.1.el7
  4. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1062.66.1.el7
  5. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-348.20.1.rt7.150.el8_5
  6. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-348.20.1.el8_5
  7. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-147.64.1.el8_1
  8. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.79.1.rt13.129.el8_2
  9. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.79.1.el8_2
  10. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-305.40.1.rt7.112.el8_4
  11. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-305.40.1.el8_4
  12. Upgrade

    Upgrade redhat/redhat-virtualization-host to a version that resolves this vulnerability.

    Fixed in 0:4.3.22-20220330.1.el7_9
  13. Upgrade

    Upgrade redhat/Kernel to a version that resolves this vulnerability.

    Fixed in 5.16
  14. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.15.15-2
  15. Upgrade

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

    Fixed in 4.15.0-1131.144~14.04.1
  16. Upgrade

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

    Fixed in 4.15.0-1120.128~16.04.1
  17. Upgrade

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

    Fixed in 4.15.0-1131.144~16.04.1
  18. Upgrade

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

    Fixed in 4.15.0-1116.130~16.04.1
  19. Upgrade

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

    Fixed in 4.15.0-169.177~16.04.1
  20. Upgrade

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

    Fixed in 4.15.0-1087.95~16.04.1
  21. Upgrade

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

    Fixed in 4.15.0-169.177
  22. Upgrade

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

    Fixed in 4.15.0-1121.129
  23. Upgrade

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

    Fixed in 5.4.0-1066.69~18.04.1
  24. Upgrade

    Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1131.144
  25. Upgrade

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

    Fixed in 5.4.0-1070.73~18.04.1
  26. Upgrade

    Upgrade ubuntu/linux-dell300x to a version that resolves this vulnerability.

    Fixed in 4.15.0-1035.40
  27. Upgrade

    Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.

    Fixed in 4.15.0-1116.130
  28. Upgrade

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

    Fixed in 5.4.0-1065.69~18.04.1
  29. Upgrade

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

    Fixed in 5.4.0-1063.66~18.04.1
  30. Upgrade

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

    Fixed in 5.4.0-1034.35~18.04.1
  31. Upgrade

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

    Fixed in 5.4.0-100.113~18.04.1
  32. Upgrade

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

    Fixed in 5.4.0-1015.16~18.04.1
  33. Upgrade

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

    Fixed in 4.15.0-1107.109
  34. Upgrade

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

    Fixed in 4.15.0-1087.95
  35. Upgrade

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

    Fixed in 5.4.0-1064.68~18.04.1
  36. Upgrade

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

    Fixed in 5.4.0-1053.60~18.04.1
  37. Upgrade

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

    Fixed in 4.15.0-1103.110
  38. Upgrade

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

    Fixed in 4.15.0-1120.129
  39. Upgrade

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

    Fixed in 4.15.0-2061.63
  40. Upgrade

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

    Fixed in 4.15.0-2043.47
  41. Upgrade

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

    Fixed in 4.15.0-1078.87
  42. Upgrade

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

    Fixed in 4.15.0-2026.28
  43. Upgrade

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

    Fixed in 5.4.0-100.113
  44. Upgrade

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

    Fixed in 5.4.0-1066.69
  45. Upgrade

    Upgrade ubuntu/linux-aws-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1014.15~20.04.1
  46. Upgrade

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

    Fixed in 5.4.0-1070.73
  47. Upgrade

    Upgrade ubuntu/linux-azure-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1014.16~20.04.1
  48. Upgrade

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

    Fixed in 5.4.0-1028.31
  49. Upgrade

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

    Fixed in 5.4.0-1065.69
  50. Upgrade

    Upgrade ubuntu/linux-gcp-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1015.18~20.04.1
  51. Upgrade

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

    Fixed in 5.4.0-1063.66
  52. Upgrade

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

    Fixed in 5.4.0-1034.35
  53. Upgrade

    Upgrade ubuntu/linux-hwe-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-30.33~20.04.1
  54. Upgrade

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

    Fixed in 5.4.0-1015.16
  55. Upgrade

    Upgrade ubuntu/linux-intel-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1010.10
  56. Upgrade

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

    Fixed in 5.4.0-1056.58
  57. Upgrade

    Upgrade ubuntu/linux-oem-5.14 to a version that resolves this vulnerability.

    Fixed in 5.14.0-1022.24
  58. Upgrade

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

    Fixed in 5.4.0-1064.68
  59. Upgrade

    Upgrade ubuntu/linux-oracle-5.13 to a version that resolves this vulnerability.

    Fixed in 5.13.0-1018.22~20.04.1
  60. Upgrade

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

    Fixed in 5.4.0-1053.60
  61. Upgrade

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

    Fixed in 5.4.0-1069.73+fips2
  62. Upgrade

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

    Fixed in 5.4.0-1073.76+fips1
  63. Upgrade

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

    Fixed in 5.4.0-1043.49
  64. Upgrade

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

    Fixed in 5.4.0-1067.71~20.04.1
  65. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1
  66. Configuration

    Blacklist the affected vmwgfx kernel module to prevent it from loading automatically at boot until a fix is available.

    Linux kernel module loader vmwgfx = blacklisted

Event History

Jan 25, 2022
Data Sourced
via Red Hat·09:07 AM
DescriptionSeverityAffected Software
Jan 27, 2022
CVE Published
08:00 PM
Jan 28, 2022
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Dec 13, 2023
CVE Published
via MITRE·08:16 AM
Data Sourced
via MITRE·08:16 AM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2022-22942?

CVE-2022-22942 is considered a critical security vulnerability due to the potential for use-after-free exploitation.

2

How do I fix CVE-2022-22942?

You can fix CVE-2022-22942 by updating your kernel to the patched versions provided by Red Hat as listed in the affected software section.

3

Which software versions are affected by CVE-2022-22942?

CVE-2022-22942 affects various versions of Red Hat's kernel and kernel-rt including kernels prior to 3.10.0-1160.59.1.el7 and 4.18.0-348.20.1.el8_5.

4

What are the risks of not addressing CVE-2022-22942?

Not addressing CVE-2022-22942 may lead to exploitation through dangling file objects, resulting in unauthorized access and potential system compromise.

5

Is CVE-2022-22942 specific to any operating system?

Yes, CVE-2022-22942 specifically affects Red Hat-based Linux distributions and VMware Photon OS.

Company

Resources

Contact

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