CVE-2022-49078

HIGH EPSS 16.0%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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/

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
16.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥4.20  –  <5.4.189
linuxlinux_kernel*≥5.5  –  <5.10.111
linuxlinux_kernel*≥5.11  –  <5.15.34
linuxlinux_kernel*≥5.16  –  <5.16.20
linuxlinux_kernel*≥5.17  –  <5.17.3

References 6

  • git.kernel.org https://git.kernel.org/stable/c/467d5e200ab4486b744fe1776154a43d1aa22d4b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6adc01a7aa37445dafe8846faa0610a86029b253
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e64dbe97c05c769525cbca099ddbd22485630235
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eafc0a02391b7b36617b36c97c4b5d6832cf5e24
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/467d5e200ab4486b744fe1776154a43d1aa22d4b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6adc01a7aa37445dafe8846faa0610a86029b253
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e64dbe97c05c769525cbca099ddbd22485630235
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eafc0a02391b7b36617b36c97c4b5d6832cf5e24
    Patch