PT-2024-7038 · Linux+6 · Linux Kernel+6
Baokun Li
·
Published
2024-09-01
·
Updated
2026-03-13
·
CVE-2024-46786
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 6.6.52
Description
A vulnerability in the Linux kernel has been resolved, which is related to the fscache module. The
fscache cookie lru timer is initialized when the fscache module is inserted, but it is not deleted when the module is removed. If timer reduce() is called before removing the fscache module, the fscache cookie lru timer will be added to the timer list of the current CPU, triggering a use-after-free in the softIRQ after removing the module. This can lead to a page fault and potentially allow an attacker to impact the confidentiality, integrity, and availability of protected information.Recommendations
To resolve this issue, update the Linux kernel to version 6.6.52 or later. As a temporary workaround, consider disabling the fscache module until a patch is available. Restrict access to the vulnerable module to minimize the risk of exploitation. Avoid using the
fscache cookie lru timer in the affected API endpoint until the issue is resolved.Exploit
Fix
DoS
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Suse
Ubuntu