CVE-2022-50746 (GCVE-0-2022-50746)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:05 – Updated: 2025-12-24 13:05
VLAI?
Title
erofs: validate the extent length for uncompressed pclusters
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 02827e1796b33f1794966f5c3101f8da2dfa9c1d , < dc8b6bd587b13b85aff6e9d36cdfcd3f955cac9e (git)
Affected: 02827e1796b33f1794966f5c3101f8da2dfa9c1d , < 40c73b2ea9611b5388807be406f30f5e4e1162da (git)
Affected: 02827e1796b33f1794966f5c3101f8da2dfa9c1d , < c505feba4c0d76084e56ec498ce819f02a7043ae (git)
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    Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: validate the extent length for uncompressed pclusters\n\nsyzkaller reported a KASAN use-after-free:\nhttps://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2\n\nThe referenced fuzzed image actually has two issues:\n - m_pa == 0 as a non-inlined pcluster;\n - The logical length is longer than its physical length.\n\nThe first issue has already been addressed.  This patch addresses\nthe second issue by checking the extent length validity."
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      "providerMetadata": {
        "dateUpdated": "2025-12-24T13:05:42.628Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "dateReserved": "2025-12-24T13:02:21.543Z",
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    "state": "PUBLISHED"
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  }
}


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Detection rules are retrieved from Rulezet.