PT-2025-53211 · Linux · Linux Kernel
Published
2023-08-04
·
Updated
2026-03-24
·
CVE-2023-54134
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a memory leak in the autofs subsystem. Specifically, waitqueue structures are not always freed correctly when their usage counter reaches zero, leading to a memory leak. This issue occurs when an
AUTOFS IOC EXPIRE MULTI ioctl is performed, allocating a new waitqueue structure with an initial usage counter of 2. If wait event killable() is interrupted, the condition wq->name.name == NULL may not be met. The autofs wait release() or autofs catatonic mode() functions decrement the counter, but the waitqueues are not always freed, resulting in a memory leak. The issue is particularly relevant during the summary execution of the automount daemon, where waiting processes may not be woken up until terminated or the mount is unmounted.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Memory Leak
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Weakness Enumeration
Related Identifiers
Affected Products
Linux Kernel