SB2026081531 - NULL pointer dereference in Linux kernel afs
Published: August 15, 2026
Security Bulletin ID
SB2026081531
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-74426)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in afs_get_tree() when handling a mount operation with a non-null dyn_root context. A local user can trigger the vulnerable code path to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678
- https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f
- https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31
- https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c
- https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19
- https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055
- https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1
- https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b