SB2026040666 - Race condition in Linux kernel fsl qbman driver
Published: April 6, 2026
Security Bulletin ID
SB2026040666
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 security vulnerability.
1) Race condition (CVE-ID: CVE-2026-23463)
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 update from vendor's website.
References
- 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