#VU124908 Race condition in Linux kernel - CVE-2026-23463
Published: April 6, 2026
Vulnerability identifier: #VU124908
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-23463
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in qman_destroy_fq when freeing and reallocating dynamic fqids. A local user can trigger concurrent qman_destroy_fq() and qman_create_fq() operations to cause a denial of service.
The issue occurs when QMAN_FQ_FLAG_DYNAMIC_FQID is set and may trigger a WARN_ON() due to inconsistent fq_table state during fqid reuse.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2
- https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5
- https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f
- https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa
- https://git.kernel.org/stable/c/9e3d47904b8153c8c3ad2f9b66d5008aad677aa8
- https://git.kernel.org/stable/c/d21923a8059fa896bfef016f55dd769299335cb4