PT-2025-2615 · Linux+4 · Linux Kernel+4
Xiuhong Wang
·
Published
2024-11-21
·
Updated
2026-05-26
·
CVE-2024-41935
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.74
Description
The issue arises from the Linux kernel's handling of the extent tree during its shrink operation. Specifically, when there is a huge number of extent nodes in the extent tree, the kernel may hold a read-write lock (rwlock) for an extremely long time, potentially triggering a kernel hang issue. This occurs because the rwlock is used to protect the core structure data of the extent tree during its shrink operation. The patch resolves this by shrinking the read extent node in batches, thereby reducing the critical region of the rwlock and avoiding its prolonged hold.
Recommendations
For Linux kernel versions prior to 6.6.74, update to version 6.6.74 or later to resolve the issue. As a temporary workaround, consider applying configuration changes to minimize the risk of kernel hang issues, although specific details on such changes are not provided.
Exploit
Fix
Improper Locking
Out of bounds Read
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Related Identifiers
Affected Products
Alt Linux
Debian
Linuxmint
Linux Kernel
Ubuntu