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Vulnerability DatabaseCVE-2022-49815
CVE-2022-49815:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2022-49815 is a vulnerability discovered in the Linux kernel, specifically affecting the erofs filesystem when operating in fscache mode. The vulnerability was disclosed on May 1, 2025, and involves issues with xarray iteration handling (NVD, Wiz).
Technical details
The vulnerability occurs in the xarray iteration process which only holds the RCU read lock and may encounter XARETRYENTRY during concurrent modification of the xarray. This technical limitation can result in an invalid entry reference, leading to system instability. The issue stems from a missing xas_retry() call in the fscache mode implementation (NVD, Red Hat).
Impact
When exploited, this vulnerability can cause the system to crash (oops) when accessing invalid entries in the xarray structure, potentially affecting system stability and availability (Wiz).
Mitigation and workarounds
The vulnerability has been fixed by adding the missing xasretry() call, which makes the iteration wind back to the root node if XARETRY_ENTRY is encountered. This fix ensures proper handling of concurrent modifications to the xarray structure (NVD).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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