SB20260816473 - Improper locking in Linux kernel gpio driver
Published: August 16, 2026
Security Bulletin ID
SB20260816473
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-2026-72063)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper interaction with a mutex in tegra_gpio_direction_input() and tegra_gpio_direction_output() when changing GPIO direction on shared GPIO lines. A local user can trigger GPIO direction operations while a per-line spinlock is held to cause a denial of service.
The issue can lead to sleeping in an atomic context.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/628c63f96f4564fa145f602af2d41daf9532201f
- https://git.kernel.org/stable/c/ac761e66708d51dac35c4c7f1891ea991dc788f0
- https://git.kernel.org/stable/c/cd17c5a1d9f186b57e9e2949be427803b7110a5c
- https://git.kernel.org/stable/c/d3e91a95b2b0fc6336dbf3ec90d831a1654d2720
- https://git.kernel.org/stable/c/e57a4845b0da60a7b9f052160878097826320954