Answer in brief
CVE-2026-89817 records a Unknown severity vulnerability in drm/gud: NUL-terminate TV mode names read from the device. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <08c8ec28547987e55a90c662f8795e05c2925498 || >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <9096edfd6f2edbc79612b482547e0972edbcfe4b || >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <89210cb5ff8fdbe055c97ac688be2268f6c815ae || >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <d0f3312f7800eb0e00d1264f66104c788f43dd69 || >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <b86438a5c6b0250ccb07dd380184d1e70e0dea6c || >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <6ea61f1d4cbaa0db937e31bffc041fb8afeacf52 || >=40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <500cb24cd61bad8a2747ddfc49b7034899c82d94 | 08c8ec28547987e55a90c662f8795e05c2925498, 9096edfd6f2edbc79612b482547e0972edbcfe4b, 89210cb5ff8fdbe055c97ac688be2268f6c815ae, d0f3312f7800eb0e00d1264f66104c788f43dd69, b86438a5c6b0250ccb07dd380184d1e70e0dea6c, 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52, 500cb24cd61bad8a2747ddfc49b7034899c82d94 |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.