PT-2025-2816 · Linux+7 · Linux Kernel+7
Liequan Che
·
Published
2024-12-02
·
Updated
2025-10-03
·
CVE-2024-48881
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions:
Linux kernel versions prior to 6.6.74
Description:
A vulnerability in the Linux kernel has been resolved. The issue is related to a NULL pointer dereference in the
cache set flush() function. This occurs when the previous registration code fails before allocating c->root, making it possible for c->root to be NULL. The bch btree node alloc() function never returns NULL, but c->root can be NULL at the line where the check is performed. The patch replaces IS ERR() with IS ERR OR NULL() to fix this issue.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 disabling the
cache set flush() function until a patch is available. Restrict access to the vulnerable bcache module to minimize the risk of exploitation. Avoid using the c->root variable in the affected cache set flush() function until the issue is resolved.Exploit
Fix
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu