CVE-2022-50746
High
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.
SeverityHigh
CVSS8.4
Exploit probability—
Product
Linux
PublishedDec 24, 2025
First seenDec 24, 2025
How to fix
Update
- Linux Linuxdc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e, 40c73b2ea9611b5388807be406f30f5e4e1162da, c505feba4c0d76084e56ec498ce819f02a7043ae or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 02827e1796b33f1794966f5c3101f8da2dfa9c1d ≤ v < dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e, 02827e1796b33f1794966f5c3101f8da2dfa9c1d ≤ v < 40c73b2ea9611b5388807be406f30f5e4e1162da, 02827e1796b33f1794966f5c3101f8da2dfa9c1d ≤ v < c505feba4c0d76084e56ec498ce819f02a7043ae, 4.19 | dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e, 40c73b2ea9611b5388807be406f30f5e4e1162da, c505feba4c0d76084e56ec498ce819f02a7043ae |
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