CVEvulnerability
CVE-2026-98605
- Status
- Received
- Published
- 2026-10-18
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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]
References
- https://git.kernel.org/stable/c/5759bbef951c39d264ac0f47daa4137d01403aea git.kernel.org
- https://git.kernel.org/stable/c/77a43e00c57486a5212ef22d4665cafad62a5d4b git.kernel.org
- https://git.kernel.org/stable/c/9b796251c3cca45a33a5c859c6818c58aa982277 git.kernel.org
- https://git.kernel.org/stable/c/ada667890773e033d2f40dc94176e3beb930b516 git.kernel.org
- https://git.kernel.org/stable/c/ebffd70e4877bb7554974cf975a27872f2bb225f git.kernel.org