UBUNTU-CVE-2022-49058: Buffer Overflow

Published Feb 26, 2025
·
Updated

In the Linux kernel, the following vulnerability has been resolved: cifs: potential buffer overflow in handling symlinks Smatch printed a warning: arch/x86/crypto/poly1305glue.c:198 poly1305updatearch() error: memcpy() 'dctx->buf' too small (16 vs u32max) It's caused because Smatch marks 'linklen' as untrusted since it comes from sscanf(). Add a check to ensure that 'linklen' is not larger than the size of the 'linkstr' buffer.

Affected Software

147 affected componentsFixes available
ubuntu/linux-azure<4.15.0-1146.161~14.04.1
4.15.0-1146.161~14.04.1
ubuntu/linux<3.13.0-219.270
3.13.0-219.270
ubuntu/linux-aws*
ubuntu/linux-lts-xenial*
ubuntu/linux-aws-hwe<4.15.0-1137.148~16.04.1
4.15.0-1137.148~16.04.1
ubuntu/linux-azure<4.15.0-1146.161~16.04.1
4.15.0-1146.161~16.04.1
ubuntu/linux-gcp<4.15.0-1131.147~16.04.1
4.15.0-1131.147~16.04.1
ubuntu/linux-hwe<4.15.0-189.200~16.04.1
4.15.0-189.200~16.04.1
ubuntu/linux-oracle<4.15.0-1102.113~16.04.1
4.15.0-1102.113~16.04.1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-hwe-edge*
ubuntu/linux-kvm*
ubuntu/linux-fips*
ubuntu/linux-fips*
ubuntu/linux<4.15.0-189.200
4.15.0-189.200
ubuntu/linux-aws<4.15.0-1137.148
4.15.0-1137.148
ubuntu/linux-aws-5.4<5.4.0-1081.88~18.04.1
5.4.0-1081.88~18.04.1
ubuntu/linux-azure-4.15<4.15.0-1146.161
4.15.0-1146.161
ubuntu/linux-azure-5.4<5.4.0-1086.91~18.04.1
5.4.0-1086.91~18.04.1
ubuntu/linux-gcp-4.15<4.15.0-1131.147
4.15.0-1131.147
ubuntu/linux-gcp-5.4<5.4.0-1084.92~18.04.1
5.4.0-1084.92~18.04.1
ubuntu/linux-hwe-5.4<5.4.0-122.138~18.04.1
5.4.0-122.138~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1029.33~18.04.1
5.4.0-1029.33~18.04.1
ubuntu/linux-kvm<4.15.0-1123.128
4.15.0-1123.128
ubuntu/linux-oracle<4.15.0-1102.113
4.15.0-1102.113
ubuntu/linux-oracle-5.4<5.4.0-1079.87~18.04.1
5.4.0-1079.87~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1066.76~18.04.1
5.4.0-1066.76~18.04.1
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-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-fips<4.15.0-2076.81
4.15.0-2076.81
ubuntu/linux-azure-fips<4.15.0-2057.63
4.15.0-2057.63
ubuntu/linux-fips<4.15.0-1094.105
4.15.0-1094.105
ubuntu/linux-gcp-fips<4.15.0-2041.46
4.15.0-2041.46
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-122.138
5.4.0-122.138
ubuntu/linux-aws<5.4.0-1081.88
5.4.0-1081.88
ubuntu/linux-azure<5.4.0-1086.91
5.4.0-1086.91
ubuntu/linux-azure-5.15<5.15.0-1008.9~20.04.1
5.15.0-1008.9~20.04.1
ubuntu/linux-bluefield<5.4.0-1042.47
5.4.0-1042.47
ubuntu/linux-gcp<5.4.0-1084.92
5.4.0-1084.92
ubuntu/linux-hwe-5.15<5.15.0-41.44~20.04.1
5.15.0-41.44~20.04.1
ubuntu/linux-ibm<5.4.0-1029.33
5.4.0-1029.33
ubuntu/linux-intel-iotg-5.15<5.15.0-1008.11~20.04.1
5.15.0-1008.11~20.04.1
ubuntu/linux-iot<5.4.0-1004.6
5.4.0-1004.6
ubuntu/linux-kvm<5.4.0-1071.76
5.4.0-1071.76
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-42.45~20.04.1
5.15.0-42.45~20.04.1
ubuntu/linux-oracle<5.4.0-1079.87
5.4.0-1079.87
ubuntu/linux-raspi<5.4.0-1066.76
5.4.0-1066.76
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-gkeop*
ubuntu/linux-gkeop-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
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<5.4.0-1081.88+fips1
5.4.0-1081.88+fips1
ubuntu/linux-azure-fips<5.4.0-1086.91+fips1
5.4.0-1086.91+fips1
ubuntu/linux-fips<5.4.0-1057.65
5.4.0-1057.65
ubuntu/linux-gcp-fips<5.4.0-1081.88+fips1
5.4.0-1081.88+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-37.39
5.15.0-37.39
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1011.14
5.15.0-1011.14
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1010.12
5.15.0-1010.12
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1008.12
5.15.0-1008.12
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1008.10
5.15.0-1008.10
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1007.8
5.15.0-1007.8
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1008.11
5.15.0-1008.11
ubuntu/linux-kvm<5.15.0-1010.11
5.15.0-1010.11
ubuntu/linux-lowlatency<5.15.0-37.39
5.15.0-37.39
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1009.12
5.15.0-1009.12
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1011.13
5.15.0-1011.13
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-realtime<5.15.0-1014.14
5.15.0-1014.14
ubuntu/linux-raspi-realtime*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 4.15.0-1146.161~14.04.1
  2. Upgrade

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

    Fixed in 3.13.0-219.270
  3. Upgrade

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

    Fixed in 4.15.0-1137.148~16.04.1
  4. Upgrade

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

    Fixed in 4.15.0-1146.161~16.04.1
  5. Upgrade

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

    Fixed in 4.15.0-1131.147~16.04.1
  6. Upgrade

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

    Fixed in 4.15.0-189.200~16.04.1
  7. Upgrade

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

    Fixed in 4.15.0-1102.113~16.04.1
  8. Upgrade

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

    Fixed in 4.15.0-189.200
  9. Upgrade

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

    Fixed in 4.15.0-1137.148
  10. Upgrade

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

    Fixed in 5.4.0-1081.88~18.04.1
  11. Upgrade

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

    Fixed in 4.15.0-1146.161
  12. Upgrade

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

    Fixed in 5.4.0-1086.91~18.04.1
  13. Upgrade

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

    Fixed in 4.15.0-1131.147
  14. Upgrade

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

    Fixed in 5.4.0-1084.92~18.04.1
  15. Upgrade

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

    Fixed in 5.4.0-122.138~18.04.1
  16. Upgrade

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

    Fixed in 5.4.0-1029.33~18.04.1
  17. Upgrade

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

    Fixed in 4.15.0-1123.128
  18. Upgrade

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

    Fixed in 4.15.0-1102.113
  19. Upgrade

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

    Fixed in 5.4.0-1079.87~18.04.1
  20. Upgrade

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

    Fixed in 5.4.0-1066.76~18.04.1
  21. Upgrade

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

    Fixed in 4.15.0-2076.81
  22. Upgrade

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

    Fixed in 4.15.0-2057.63
  23. Upgrade

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

    Fixed in 4.15.0-1094.105
  24. Upgrade

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

    Fixed in 4.15.0-2041.46
  25. Upgrade

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

    Fixed in 5.4.0-122.138
  26. Upgrade

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

    Fixed in 5.4.0-1081.88
  27. Upgrade

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

    Fixed in 5.4.0-1086.91
  28. Upgrade

    Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1008.9~20.04.1
  29. Upgrade

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

    Fixed in 5.4.0-1042.47
  30. Upgrade

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

    Fixed in 5.4.0-1084.92
  31. Upgrade

    Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-41.44~20.04.1
  32. Upgrade

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

    Fixed in 5.4.0-1029.33
  33. Upgrade

    Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1008.11~20.04.1
  34. Upgrade

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

    Fixed in 5.4.0-1004.6
  35. Upgrade

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

    Fixed in 5.4.0-1071.76
  36. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-42.45~20.04.1
  37. Upgrade

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

    Fixed in 5.4.0-1079.87
  38. Upgrade

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

    Fixed in 5.4.0-1066.76
  39. Upgrade

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

    Fixed in 5.4.0-1081.88+fips1
  40. Upgrade

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

    Fixed in 5.4.0-1086.91+fips1
  41. Upgrade

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

    Fixed in 5.4.0-1057.65
  42. Upgrade

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

    Fixed in 5.4.0-1081.88+fips1
  43. Upgrade

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

    Fixed in 5.15.0-37.39
  44. Upgrade

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

    Fixed in 5.15.0-1011.14
  45. Upgrade

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

    Fixed in 5.15.0-1010.12
  46. Upgrade

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

    Fixed in 5.15.0-1008.12
  47. Upgrade

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

    Fixed in 5.15.0-1008.10
  48. Upgrade

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

    Fixed in 5.15.0-1007.8
  49. Upgrade

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

    Fixed in 5.15.0-1008.11
  50. Upgrade

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

    Fixed in 5.15.0-1010.11
  51. Upgrade

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

    Fixed in 5.15.0-37.39
  52. Upgrade

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

    Fixed in 5.15.0-1009.12
  53. Upgrade

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

    Fixed in 5.15.0-1011.13
  54. Upgrade

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

    Fixed in 5.15.0-1014.14
  55. Configuration

    Add a check to ensure that 'link_len' is not larger than the size of the 'link_str' buffer before copying or processing the symlink data.

    CIFS symlink handling link_len bounds check = link_len <= size of the link_str buffer

Event History

Feb 26, 2025
CVE Published
via OSV·07:00 AM
Data Sourced
via OSV·07:00 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

Which Ubuntu systems are potentially affected?

Systems using the listed Ubuntu kernel packages may be affected: linux, linux-fips, linux-azure, linux-aws, linux-gcp, linux-oracle, linux-kvm, and linux-aws-fips.

2

What does an attacker need to exploit this issue?

The issue is reachable over the network and has low attack complexity, with no privileges required. Exploitation requires user interaction, according to the supplied severity vector.

3

What is the impact of successful exploitation?

The reported impact is availability only: the severity vector indicates high availability impact and no stated impact to confidentiality or integrity. The underlying flaw is a buffer overflow in CIFS symlink handling.

4

What condition does the fix enforce?

The fix checks that the parsed symlink length, link_len, does not exceed the size of the link_str buffer before it is used.

Company

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