CVE-2026-89817: drm/gud: NUL-terminate TV mode names read from the device
Noroxi assessment
Priority: Monitor (action score 0/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
- Fixed version: Linux Linux 08c8ec28547987e55a90c662f8795e05c2925498, 500cb24cd61bad8a2747ddfc49b7034899c82d94, 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 08c8ec28547987e55a90c662f8795e05c2925498, 500cb24cd61bad8a2747ddfc49b7034899c82d94, 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Sep 16, 2026
- Updated
- Oct 19, 2026
- EPSS
- 0.2% · 11th percentile
- CWE
- —
Report tools
Action score
0
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
—
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 5.13affected
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before 08c8ec28547987e55a90c662f8795e05c2925498affected · git
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before 9096edfd6f2edbc79612b482547e0972edbcfe4baffected · git
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before 89210cb5ff8fdbe055c97ac688be2268f6c815aeaffected · git
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before d0f3312f7800eb0e00d1264f66104c788f43dd69affected · git
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before b86438a5c6b0250ccb07dd380184d1e70e0dea6caffected · git
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52affected · git
- 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 and later · before 500cb24cd61bad8a2747ddfc49b7034899c82d94affected · git
- before 5.13not affected · semver
- 5.15.221 and later · up to and including 5.15.*not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.190-1 | 6.1.190-1 |
| Debian:12 | linux-6.12 | before 6.12.111-1~deb12u1 | 6.12.111-1~deb12u1 |
| Debian:13 | linux | before 6.12.111-1 | 6.12.111-1 |
| Debian:14 | linux | before 7.2.6-1 | 7.2.6-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation40Plan
- CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment40Plan
- CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()40Plan
Published before and after this one in the same product
- ← EarlierCVE-2026-89815Sep 16, 2026 · drm/ttm: Drop tt->restore after successful restore31Monitor
- ← EarlierCVE-2026-89816Sep 16, 2026 · drm: Fix drm_crtc_commit leak if signaled when PAGE_FLIP_EVENT is used0Monitor
- Later →CVE-2026-89818Sep 16, 2026 · drm/amdgpu/vcn: fix integer overflow in dec_msg buffer count check28Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 08c8ec28547987e55a90c662f8795e05c2925498 | Vendor (CNA) |
| Linux Linux | 500cb24cd61bad8a2747ddfc49b7034899c82d94 | Vendor (CNA) |
| Linux Linux | 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52 | Vendor (CNA) |
| Linux Linux | 89210cb5ff8fdbe055c97ac688be2268f6c815ae | Vendor (CNA) |
| Linux Linux | 9096edfd6f2edbc79612b482547e0972edbcfe4b | Vendor (CNA) |
| Linux Linux | b86438a5c6b0250ccb07dd380184d1e70e0dea6c | Vendor (CNA) |
| Linux Linux | d0f3312f7800eb0e00d1264f66104c788f43dd69 | Vendor (CNA) |
| azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 | — | Microsoft (MSRC) |
| azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 | 6.6.157.1-1 · Release Notes | Microsoft (MSRC) |
| debian:linux | 6.1.190-1 · Debian:12 | Package registry (OSV) |
| debian:linux | 6.12.111-1 · Debian:13 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.111-1~deb12u1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-1114 · Sep 17, 2026(Linux Kernel Güvenlik Bildirimi)
Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
—
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (1)
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (6 more)Show less
- git.kernel.org/stable/c/500cb24cd61bad8a2747ddfc49b7034899c82d94
- git.kernel.org/stable/c/6ea61f1d4cbaa0db937e31bffc041fb8afeacf52
- git.kernel.org/stable/c/89210cb5ff8fdbe055c97ac688be2268f6c815ae
- git.kernel.org/stable/c/9096edfd6f2edbc79612b482547e0972edbcfe4b
- git.kernel.org/stable/c/b86438a5c6b0250ccb07dd380184d1e70e0dea6c
- git.kernel.org/stable/c/d0f3312f7800eb0e00d1264f66104c788f43dd69
Vendor advisories and official records. Exploit/PoC links are deliberately left out.