SB20261015145 - Deadlock in Linux kernel fs
Published: October 15, 2026
Security Bulletin ID
SB20261015145
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Deadlock (CVE-ID: CVE-2026-98388)
CWE-ID: CWE-833 - Deadlock
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a deadlock in do_close_on_exec() in fs/exec.c when closing file descriptors during process execution while holding exec_update_lock. A local user can trigger process execution involving a FUSE filesystem that attempts to inspect the calling process to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53
- https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da
- https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d
- https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8
- https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38
- https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928
- https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1
- https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813