CVE-2022-50746
Unknown Unknown - Not Provided
Use-After-Free in Linux Kernel EROFS Due to Invalid Extent Length

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

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.
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-05-07
AI Q&A
2025-12-24
EPSS Evaluated
2026-05-05
NVD
CVE-2022-50746
EUVD
EUVD-2022-55815
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability in the Linux kernel's erofs filesystem involves improper validation of the extent length for uncompressed pclusters. Specifically, a use-after-free issue was reported by syzkaller, related to the logical length of a pcluster being longer than its physical length. The patch fixes this by validating the extent length to prevent this inconsistency.


How can this vulnerability impact me? :

This vulnerability could lead to a use-after-free condition in the Linux kernel, which may cause system instability, crashes, or potential exploitation by attackers to execute arbitrary code or escalate privileges.


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