CVE-2026-98605 drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach
A race condition in the Samsung DSIM driver causes GPIO resource leaks during host reattachment, potentially leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98605?
CVE-2026-98605 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/bridge: samsung-dsim: fix TE GPIO lifetime for host attach
When the Exynos DSI driver was generalized into samsung-dsim, the TE GPIO acquisition was switched from gpiod_get_optional() to devm_gpiod_get_optional() while keeping the matching gpiod_put() calls. That combination is wrong for a managed descriptor.
However, dropping the puts and keeping the managed get is also wrong: samsung_dsim_register_te_irq() runs from the DSI host attach callback, and host detach/reattach can happen without destroying the device that owns the managed action. A second attach would then request the GPIO again without having released it.
Switch back to a non-managed gpiod_get_optional() and keep the explicit gpiod_put() on the request_irq() error path and in samsung_dsim_unregister_te_irq().
[Luca: remove unnecessary comment]
Which versions are affected by CVE-2026-98605?
How do I fix CVE-2026-98605?
Apply the vendor's patch.
Is CVE-2026-98605 being exploited?
There is no known exploitation of CVE-2026-98605 in the wild and no public exploit code.
Sources
Also known as AZL-109097, BELL-CVE-2026-98605, DEBIAN-CVE-2026-98605, GHSA-7p9h-67r4-584r, UBUNTU-CVE-2026-98605.