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Description

In the Linux kernel, the following vulnerability has been resolved: erofs: validate the extent length for uncompressed pclusters syzkaller reported a KASAN use-after-free: https://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2 The referenced fuzzed image actually has two issues: - m_pa == 0 as a non-inlined pcluster; - The logical length is longer than its physical length. The first issue has already been addressed. This patch addresses the second issue by checking the extent length validity.

PUBLISHED Reserved 2025-12-24 | Published 2025-12-24 | Updated 2025-12-24 | Assigner Linux

Product status

Default status
unaffected

02827e1796b33f1794966f5c3101f8da2dfa9c1d (git) before dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e
affected

02827e1796b33f1794966f5c3101f8da2dfa9c1d (git) before 40c73b2ea9611b5388807be406f30f5e4e1162da
affected

02827e1796b33f1794966f5c3101f8da2dfa9c1d (git) before c505feba4c0d76084e56ec498ce819f02a7043ae
affected

Default status
affected

4.19
affected

Any version before 4.19
unaffected

6.0.16 (semver)
unaffected

6.1.2 (semver)
unaffected

6.2 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e

git.kernel.org/...c/40c73b2ea9611b5388807be406f30f5e4e1162da

git.kernel.org/...c/c505feba4c0d76084e56ec498ce819f02a7043ae

cve.org (CVE-2022-50746)

nvd.nist.gov (CVE-2022-50746)

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Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.