drm/gud: NUL-terminate TV mode names read from the device
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 4 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat OpenShift Container Platform 4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89817
- 2026-10-03 Alias added: GHSA-g57w-mh9m-gp2m
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-01 Affected versions changed · Red Hat
- 2026-11-01 CVSS score added · Red Hat
References
Other 7
- https://git.kernel.org/stable/c/08c8ec28547987e55a90c662f8795e05c2925498
- https://git.kernel.org/stable/c/9096edfd6f2edbc79612b482547e0972edbcfe4b
- https://git.kernel.org/stable/c/89210cb5ff8fdbe055c97ac688be2268f6c815ae
- https://git.kernel.org/stable/c/d0f3312f7800eb0e00d1264f66104c788f43dd69
- https://git.kernel.org/stable/c/b86438a5c6b0250ccb07dd380184d1e70e0dea6c
- https://git.kernel.org/stable/c/6ea61f1d4cbaa0db937e31bffc041fb8afeacf52
- https://git.kernel.org/stable/c/500cb24cd61bad8a2747ddfc49b7034899c82d94
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Sources
- CVE-2026-89817 · CVE Program
- CVE-2026-89817 · NVD
- FIRST EPSS
- GHSA-g57w-mh9m-gp2m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89817 · Red Hat security data · CC BY 4.0
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