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CVE-2026-89817

UnknownEPSS 0.21%

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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.21%

9.9th percentile

Probability of exploitation in the next 30 days. Learn more

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. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
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