SB2026070275 - Improper locking in Linux kernel slimbus driver
Published: July 2, 2026
Security Bulletin ID
SB2026070275
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-2026-53331)
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 qcom_slim_ngd_ssr_pdr_notify() and slim_report_absent() when processing SSR/PDR down notifications. A local user can trigger the vulnerable locking sequence to cause a denial of service.
The issue arises from inconsistent lock ordering between ctrl->tx_lock and ctrl->lock, creating a possible deadlock.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3d1561537237c6cc1db76155183d8bbdac2339f0
- https://git.kernel.org/stable/c/55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec
- https://git.kernel.org/stable/c/9708eb50fd7343145b422be852f890212155d845
- https://git.kernel.org/stable/c/9f0d45d509b434c54da10e01f4ef8086e4583401
- https://git.kernel.org/stable/c/aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8
- https://git.kernel.org/stable/c/d54a221b0f3cd9e1f03f18104be34e02a8258fae
- https://git.kernel.org/stable/c/dc4d5c57e012c2c669793deb1515a57bbc6bf5dd