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CVE-2022-50746

erofs: validate the extent length for uncompressed pclusters

HIGH
8.4
CVSS Score
Published: December 24, 2025 at 01:05 PM UTC
Updated: October 15, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
02827e1796b33f1794966f5c3101f8da2dfa9c1d2827e1796b33f1794966f5c3101f8da2dfa9c1d4.19
Vendor states this is fixed in 40c73b2ea9611b5388807be406f30f5e4e1162da (fixed)
Vendor states this is fixed in c505feba4c0d76084e56ec498ce819f02a7043ae (fixed)
Vendor states this is fixed in dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e (fixed)
Vendor states this is fixed in 4.19 (unaffected)
Vendor states this is fixed in 6.0.16 (unaffected)
Vendor states this is fixed in 6.1.2 (unaffected)
Vendor states this is fixed in 6.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/40c73b2ea9611b5388807be406f30f5e4e1162da
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/c505feba4c0d76084e56ec498ce819f02a7043ae
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHLinux
Vector?

Quick Info

StatusDEFERRED

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