CVE-2026-89817 PUBLISHED

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

Assigner: Linux
Reserved: 11.09.2026 Published: 16.09.2026 Updated: 16.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to 08c8ec28547987e55a90c662f8795e05c2925498 (excl.)
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to 9096edfd6f2edbc79612b482547e0972edbcfe4b (excl.)
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to 89210cb5ff8fdbe055c97ac688be2268f6c815ae (excl.)
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to d0f3312f7800eb0e00d1264f66104c788f43dd69 (excl.)
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to b86438a5c6b0250ccb07dd380184d1e70e0dea6c (excl.)
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52 (excl.)
  • affected from 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 to 500cb24cd61bad8a2747ddfc49b7034899c82d94 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.13 is affected
  • unaffected from 0 to 5.13 (excl.)
  • unaffected from 5.15.221 to 5.15.* (incl.)
  • unaffected from 6.1.188 to 6.1.* (incl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.51 to 6.18.* (incl.)
  • unaffected from 7.2.5 to 7.2.* (incl.)
  • unaffected from 7.3-rc2 to * (incl.)

References