CVE-2026-89817 (GCVE-0-2026-89817)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:30 – Updated: 2026-09-16 10:30
VLAI
Title
drm/gud: NUL-terminate TV mode names read from the device
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < 08c8ec28547987e55a90c662f8795e05c2925498 (git)
Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < 9096edfd6f2edbc79612b482547e0972edbcfe4b (git)
Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < 89210cb5ff8fdbe055c97ac688be2268f6c815ae (git)
Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < d0f3312f7800eb0e00d1264f66104c788f43dd69 (git)
Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < b86438a5c6b0250ccb07dd380184d1e70e0dea6c (git)
Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < 6ea61f1d4cbaa0db937e31bffc041fb8afeacf52 (git)
Affected: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 , < 500cb24cd61bad8a2747ddfc49b7034899c82d94 (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.51 , ≤ 6.18.* (semver)
Unaffected: 7.2.5 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: NUL-terminate TV mode names read from the device\n\ngud_connector_add_tv_mode() reads a buffer of fixed-size mode names from\nthe USB device and passes pointers into it to\ndrm_mode_create_tv_properties_legacy(), which calls strlen() on each one.\nNothing guarantees the device NUL-terminates a name, so strlen() can run\npast the end of a slot and, for the last mode, past the end of the\nallocation.\n\nTerminate each name at the end of its slot before use."
        }
      ],
      "providerMetadata": {
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    "dateReserved": "2026-09-11T19:38:34.768Z",
    "dateUpdated": "2026-09-16T10:30:49.977Z",
    "state": "PUBLISHED"
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: NUL-terminate TV mode names read from the device\n\ngud_connector_add_tv_mode() reads a buffer of fixed-size mode names from\nthe USB device and passes pointers into it to\ndrm_mode_create_tv_properties_legacy(), which calls strlen() on each one.\nNothing guarantees the device NUL-terminates a name, so strlen() can run\npast the end of a slot and, for the last mode, past the end of the\nallocation.\n\nTerminate each name at the end of its slot before use."
          }
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        "id": "CVE-2026-89817",
        "lastModified": "2026-09-16T11:16:46.990",
        "metrics": {},
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        "vulnStatus": "Received"
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      "current_release_date": "2026-09-19T01:44:54Z",
      "cve": "CVE-2026-89817",
      "id": "CVE-2026-89817",
      "initial_release_date": "2026-09-17T16:38:12Z",
      "product_status:known_affected": "163",
      "product_status:known_not_affected": "184",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89817",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89817.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.