Vulnerability 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]/
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.20, < 5.4.189 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/467d5e200ab4486b744fe1776154a43d1aa22d4bPatch
- https://git.kernel.org/stable/c/6adc01a7aa37445dafe8846faa0610a86029b253Patch
- https://git.kernel.org/stable/c/73953dfa9d50e5c9fe98ee13fd1d3427aa12a0a3Patch
- https://git.kernel.org/stable/c/9fb8bc6cfc58773ce95414e11c9ccc8fc6ac4927Patch
- https://git.kernel.org/stable/c/e64dbe97c05c769525cbca099ddbd22485630235Patch
- https://git.kernel.org/stable/c/eafc0a02391b7b36617b36c97c4b5d6832cf5e24Patch
FAQ
What is CVE-2022-49078?
CVE-2022-49078 is a vulnerability with a CVSS score of 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 or...
How severe is CVE-2022-49078?
CVE-2022-49078 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49078?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.