CVE-2026-89817

high

Description

In the Linux kernel, the following vulnerability has been resolved: drm/gud: NUL-terminate TV mode names read from the device gud_connector_add_tv_mode() reads a buffer of fixed-size mode names from the USB device and passes pointers into it to drm_mode_create_tv_properties_legacy(), which calls strlen() on each one. Nothing guarantees the device NUL-terminates a name, so strlen() can run past the end of a slot and, for the last mode, past the end of the allocation. Terminate each name at the end of its slot before use.

References

https://git.kernel.org/stable/c/d0f3312f7800eb0e00d1264f66104c788f43dd69

https://git.kernel.org/stable/c/b86438a5c6b0250ccb07dd380184d1e70e0dea6c

https://git.kernel.org/stable/c/9096edfd6f2edbc79612b482547e0972edbcfe4b

https://git.kernel.org/stable/c/89210cb5ff8fdbe055c97ac688be2268f6c815ae

https://git.kernel.org/stable/c/6ea61f1d4cbaa0db937e31bffc041fb8afeacf52

https://git.kernel.org/stable/c/500cb24cd61bad8a2747ddfc49b7034899c82d94

https://git.kernel.org/stable/c/08c8ec28547987e55a90c662f8795e05c2925498

Details

Source: Mitre, NVD

Published: 2026-09-16

Updated: 2026-09-16

Risk Information

CVSS v2

Base Score: 6.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 7.1

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Severity: High

EPSS

EPSS: 0.00205