SB20260815154 - NULL pointer dereference in Linux kernel btrfs
Published: August 15, 2026
Security Bulletin ID
SB20260815154
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-2026-74321)
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 an invalid pointer dereference in __btrfs_run_delayed_refs() when processing delayed references. 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/015dc4a1e0c2cba551d4620eba13d26d5081dc34
- https://git.kernel.org/stable/c/3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1
- https://git.kernel.org/stable/c/486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae
- https://git.kernel.org/stable/c/65770111a2d47c2b15e20b2ba92bb12198f289d4
- https://git.kernel.org/stable/c/9faa6b69ad73f03c7bde53e07d75a28822dc9a1a
- https://git.kernel.org/stable/c/a71143590ce9764dbcb47617647592ff8b4d48bc
- https://git.kernel.org/stable/c/ba9fa2ff5981589bb49094d3358c339b37c47f53
- https://git.kernel.org/stable/c/c372ca227e16bace86f1df1fa4ae6849e2fcfa28