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CVE-2022-49078

7.8 · HIGH

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…

Published Feb 26, 2025CWE-416EPSS 0.28%

Overview

CVE-2022-49078 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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/[email protected]/

[2] https://github.com/lz4/lz4/commit/c5d6f8a8be3927c0bec91bcc58667a6cfad244ad#

[3] https://lore.kernel.org/all/[email protected]/

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/467d5e200ab4486b744fe1776154a43d1aa22d4bRefgit.kernel.org/stable/c/6adc01a7aa37445dafe8846faa0610a86029b253Refgit.kernel.org/stable/c/73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3Refgit.kernel.org/stable/c/9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927Refgit.kernel.org/stable/c/e64dbe97c05c769525cbca099ddbd22485630235Refgit.kernel.org/stable/c/eafc0a02391b7b36617b36c97c4b5d6832cf5e24

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49078?

CVE-2022-49078 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49078?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49078?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49078 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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