PT-2025-16710 · Linux+6 · Linux Kernel+6
Published
2025-03-17
·
Updated
2026-04-20
·
CVE-2025-22070
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 (affected versions not specified)
Description
A NULL pointer dereference issue occurs when a 9p tree is mounted with the 'posixacl' option and a subdirectory is created. This happens because the
v9fs fid add() call in the v9fs vfs mkdir dotl() function sets the fid pointer to NULL, which is then used by the v9fs set create acl() call, expecting a valid non-NULL fid pointer. This results in a kernel NULL pointer dereference.Recommendations
To resolve this issue, the sequence of calls in the
v9fs vfs mkdir dotl() function should be swapped, calling v9fs set create acl() before v9fs fid add().
At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu