SB20260720206 - Use-after-free in Linux kernel gpio driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-64023)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 a use-after-free in the gpio aggregator lookup table handling in drivers/gpio/gpio-aggregator.c when processing concurrent lookup operations during error cleanup. A local user can trigger a race condition that causes gpiod_find() to dereference freed memory to cause a denial of service.

The issue occurs when a concurrent thread reaches gpiod_match_lookup_table() before the lookup table entry is removed.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/30c073cab97afb31901f94de9605177b6b84367e
• https://git.kernel.org/stable/c/7ac4183a41ba048af89eddd82fe8be64619d0871
• https://git.kernel.org/stable/c/ea28b286649b70618e9dd3e895812417a7712a11