SB20260507136 - Improper locking in Linux kernel pci driver
Published: May 7, 2026
Security Bulletin ID
SB20260507136
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) Improper locking (CVE-ID: CVE-2026-43211)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: 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
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper lock handling in pci_slot_trylock() when handling a pci_bus_trylock() failure path. A local user can trigger the affected code path to cause a denial of service.
The issue can result in unlocking a lock that is not held or incorrectly unlocking a lock owned by another thread.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0425aaf20b407d2f2cf3bf469808e4a35f9abb8b
- https://git.kernel.org/stable/c/8b08ea9690b212b7bf7f12414039259cf34b1aa0
- https://git.kernel.org/stable/c/9368d1ee62829b08aa31836b3ca003803caf0b72
- https://git.kernel.org/stable/c/943ed56606a7ab2fe5a99cad572dd17d484310c7
- https://git.kernel.org/stable/c/a19b61fdb958ffadbba85b43c991eb9fc70c1c1c
- https://git.kernel.org/stable/c/bd435f4b738130d732ef64e0e57e45185f77165d
- https://git.kernel.org/stable/c/ebb27b7399ab8b9eb1f792b329aa5f6250c590d4
- https://git.kernel.org/stable/c/fbe06a3058114bf95a17a4941b205f4b321c6f0a