Riskcovery

CVE-2022-49078

lz4: fix LZ4_decompress_safe_partial read out of bound

State
Published
Severity
7.8 High
Published
Feb 26, 2025
Updated
Aug 5, 2026
Reserved
Feb 26, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

lz4: fix LZ4_decompress_safe_partial read out of bound

When partialDecoding, it is EOF if we've either filled the output buffer or can't proceed with reading an offset for following match.

In some extreme corner cases when compressed data is suitably corrupted, UAF will occur. As reported by KASAN [1], LZ4_decompress_safe_partial may lead to read out of bound problem during decoding. lz4 upstream has fixed it [2] and this issue has been disscussed here [3] before.

current decompression routine was ported from lz4 v1.8.3, bumping lib/lz4 to v1.9.+ is certainly a huge work to be done later, so, we'd better fix it first.

[1] https://lore.kernel.org/all/000000000000830d1205cf7f0477@google.com/ [2] https://github.com/lz4/lz4/commit/c5d6f8a8be3927c0bec91bcc58667a6cfad244ad# [3] https://lore.kernel.org/all/CC666AE8-4CA4-4951-B6FB-A2EFDE3AC03B@fb.com/

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 2209fda323e2fd2a2d0885595fd5097717f8d2aa to before 73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3Affected
  • 2209fda323e2fd2a2d0885595fd5097717f8d2aa to before 6adc01a7aa37445dafe8846faa0610a86029b253Affected
  • 2209fda323e2fd2a2d0885595fd5097717f8d2aa to before 9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927Affected
  • 2209fda323e2fd2a2d0885595fd5097717f8d2aa to before e64dbe97c05c769525cbca099ddbd22485630235Affected
  • 2209fda323e2fd2a2d0885595fd5097717f8d2aa to before 467d5e200ab4486b744fe1776154a43d1aa22d4bAffected
  • 2209fda323e2fd2a2d0885595fd5097717f8d2aa to before eafc0a02391b7b36617b36c97c4b5d6832cf5e24Affected
LinuxLinux
  • 4.20Affected
  • before 4.20Not affected
  • 5.4.189 through 5.4.*Not affected
  • 5.10.111 through 5.10.*Not affected
  • 5.15.34 through 5.15.*Not affected
  • 5.16.20 through 5.16.*Not affected
  • 5.17.3 through 5.17.*Not affected
  • 5.18 and laterNot affected

References

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