CVE-2026-89817

drm/gud: NUL-terminate TV mode names read from the device

State: Published
Severity: Not scored
Published: Sep 16, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 08c8ec28547987e55a90c662f8795e05c2925498Affected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 9096edfd6f2edbc79612b482547e0972edbcfe4bAffected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 89210cb5ff8fdbe055c97ac688be2268f6c815aeAffected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before d0f3312f7800eb0e00d1264f66104c788f43dd69Affected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before b86438a5c6b0250ccb07dd380184d1e70e0dea6cAffected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52Affected 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 500cb24cd61bad8a2747ddfc49b7034899c82d94Affected
LinuxLinux	5.13Affected before 5.13Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.51 through 6.18.Not affected 7.2.5 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 08c8ec28547987e55a90c662f8795e05c2925498Affected
40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 9096edfd6f2edbc79612b482547e0972edbcfe4bAffected
40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 89210cb5ff8fdbe055c97ac688be2268f6c815aeAffected
40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before d0f3312f7800eb0e00d1264f66104c788f43dd69Affected
40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before b86438a5c6b0250ccb07dd380184d1e70e0dea6cAffected
40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52Affected
40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to before 500cb24cd61bad8a2747ddfc49b7034899c82d94Affected

LinuxLinux

5.13Affected
before 5.13Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.51 through 6.18.*Not affected
7.2.5 through 7.2.*Not affected
7.3 and laterNot affected

References

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