Bug 2535317 (CVE-2026-89817) - CVE-2026-89817 kernel: drm/gud: NUL-terminate TV mode names read from the device
Summary: CVE-2026-89817 kernel: drm/gud: NUL-terminate TV mode names read from the device
Keywords:
Status: NEW
Alias: CVE-2026-89817
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-16 12:02 UTC by OSIDB Bzimport
Modified: 2026-11-01 06:19 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-09-16 12:02:02 UTC
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.


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