Linux Kernel up to 7.3-rc1 gud gud_drv.c gud_connector_add_tv_mode out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00+

Summaryinfo

A vulnerability has been found in Linux Kernel up to 7.3-rc1 and classified as very critical. This vulnerability affects the function gud_connector_add_tv_mode of the file drivers/gpu/drm/gud/gud_drv.c of the component gud. Performing a manipulation results in out-of-bounds. This vulnerability is cataloged as CVE-2026-89817. The attack must be initiated from a local position. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.3-rc1. This affects the function gud_connector_add_tv_mode of the file drivers/gpu/drm/gud/gud_drv.c of the component gud. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-89817 since 09/11/2026. The exploitability is told to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/16/2026).

Upgrading to version 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5 or 7.3-rc2 eliminates this vulnerability. Applying the patch 08c8ec28547987e55a90c662f8795e05c2925498/9096edfd6f2edbc79612b482547e0972edbcfe4b/89210cb5ff8fdbe055c97ac688be2268f6c815ae/d0f3312f7800eb0e00d1264f66104c788f43dd69/b86438a5c6b0250ccb07dd380184d1e70e0dea6c/6ea61f1d4cbaa0db937e31bffc041fb8afeacf52/500cb24cd61bad8a2747ddfc49b7034899c82d94 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.221/6.1.188/6.6.157/6.12.110/6.18.51/7.2.5/7.3-rc2
Patch: 08c8ec28547987e55a90c662f8795e05c2925498/9096edfd6f2edbc79612b482547e0972edbcfe4b/89210cb5ff8fdbe055c97ac688be2268f6c815ae/d0f3312f7800eb0e00d1264f66104c788f43dd69/b86438a5c6b0250ccb07dd380184d1e70e0dea6c/6ea61f1d4cbaa0db937e31bffc041fb8afeacf52/500cb24cd61bad8a2747ddfc49b7034899c82d94

Timelineinfo

09/11/2026 CVE reserved
09/16/2026 +5 days Advisory disclosed
09/16/2026 +0 days VulDB entry created
09/16/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-89817 (🔒)
GCVE (CVE): GCVE-0-2026-89817
GCVE (VulDB): GCVE-100-405639

Entryinfo

Created: 09/16/2026 13:10
Changes: 09/16/2026 13:10 (60)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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