SB20260626105 - Use-after-free in Linux kernel gpio driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-53226)

CWE-ID: CWE-416 - Use After Free

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 a use-after-free in the rockchip gpio irq domain handling in drivers/gpio/gpio-rockchip.c when removing a gpio bank and later processing generic irq chip suspend, resume, or shutdown callbacks. A local user can trigger device removal so that stale generic irq chip entries are later dereferenced to cause a denial of service.

The issue is associated with leaked domain generic chip structures that remain on the global gc_list after the gpio bank has been removed.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1c1e0fc88d6ef65bf15d517853251f75ab9d18c3
• https://git.kernel.org/stable/c/1f34ea5f6114011092d9a5c8b901ad6741144a1d
• https://git.kernel.org/stable/c/bace7b99bfa555fe833aee8827b8004c43666d02