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CVE-2026-89817

Unknown

Last modified

CVE-2026-89817 is a vulnerability of currently unknown severity. 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..

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < 08c8ec28547987e55a90c662f8795e05c2925498; >= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < 9096edfd6f2edbc79612b482547e0972edbcfe4b; >= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < 89210cb5ff8fdbe055c97ac688be2268f6c815ae; >= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < d0f3312f7800eb0e00d1264f66104c788f43dd69; >= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < b86438a5c6b0250ccb07dd380184d1e70e0dea6c; >= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52; >= 40e1a70b4aedf2859a1829991b48ef0ebe650bf2, < 500cb24cd61bad8a2747ddfc49b7034899c82d94
LinuxLinux5.13

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89817?
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.
How severe is CVE-2026-89817?
Severity scoring for CVE-2026-89817 is pending analysis.
How do I fix CVE-2026-89817?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST