SB2026081662 - NULL pointer dereference in Linux kernel md driver
Published: August 16, 2026
Security Bulletin ID
SB2026081662
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-2026-72316)
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 metadata_open() when handling an allocation failure. A local user can trigger the vulnerable code path to cause a denial of service.
The issue occurs because a NULL return value was treated as a valid metadata pointer instead of an error.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/01c49eae7c6256f2d8cc08210a2bac3ee070e43a
- https://git.kernel.org/stable/c/14e03ecd3b1b5fc03c082b27a2f8889f8290c30e
- https://git.kernel.org/stable/c/17eb2ab13edd0b06ce6f996c5fd450d7efabb2e8
- https://git.kernel.org/stable/c/889374b8e4a60d13fe4a5a8ae3a311ca93d1a2c3
- https://git.kernel.org/stable/c/9ae672606c17891d90b282e3490b817620549599
- https://git.kernel.org/stable/c/a705e056c2f3dd067fb2ff414f0537530baa090b
- https://git.kernel.org/stable/c/b69ea153d30ce19ca8997eeeca1e2219fae5a29b
- https://git.kernel.org/stable/c/bd5a80128bdfc93b1cae935a70da000b8c483e6e