PT-2025-3621 · Linux+7 · Linux Kernel+7
Syzbot
·
Published
2024-12-06
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Updated
2025-10-03
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CVE-2024-57896
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.74
Description
A use-after-free vulnerability in the Linux kernel has been resolved. The issue occurs when the cleaner kthread is stopped during the unmount path, but a worker from the delalloc workers queue may still be running and try to wake up the already destroyed cleaner kthread, resulting in a use-after-free on the task struct. The vulnerability was reported by Syzbot with a stack trace showing the error in lock acquire.
Recommendations
To resolve the issue, update the Linux kernel to version 6.6.74 or later. As a temporary workaround, consider disabling the
submit compressed extents() function until a patch is available. Restrict access to the vulnerable btrfs work helper() function to minimize the risk of exploitation. Avoid using the btrfs add delayed iput() function in the affected API endpoint until the issue is resolved.Exploit
Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu