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CVE-2026-89817

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, and 1 more
None on Exploit-DB, Metasploit or GitHub

Summary

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.

Timeline

  1. CVE published
  2. Record last updated

Affected versions

  • Linux Linux

    From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in 08c8ec28547987e55a90c662f8795e05c2925498; From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in 9096edfd6f2edbc79612b482547e0972edbcfe4b; From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in 89210cb5ff8fdbe055c97ac688be2268f6c815ae; From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in d0f3312f7800eb0e00d1264f66104c788f43dd69; From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in b86438a5c6b0250ccb07dd380184d1e70e0dea6c; From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52; From 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 · fixed in 500cb24cd61bad8a2747ddfc49b7034899c82d94

  • Linux Linux

    5.13

  • KernelLinux

    From 5.13.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.51; From 6.19.0 · fixed in 7.2.5

References 7

git.kernel.org