Vulnerability-Lookup

GHSA-V3G3-P6WJ-RWGR

Vulnerability from github – Published: 2026-10-28 12:31 – Updated: 2026-10-28 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/i915/dmc: Harden DMC firmware payload parsing

Validate the conversion of the DMC firmware size from dwords to bytes using check_mul_overflow() before calculating the firmware payload size.

Reject zero-length payloads and zero MMIO counts in the DMC firmware header so malformed firmware is caught early. Also set dmc_fw_size only after the payload allocation succeeds.

(cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-99118"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T11:17:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/dmc: Harden DMC firmware payload parsing\n\nValidate the conversion of the DMC firmware size from dwords to bytes\nusing check_mul_overflow() before calculating the firmware payload size.\n\nReject zero-length payloads and zero MMIO counts in the DMC firmware\nheader so malformed firmware is caught early. Also set dmc_fw_size only\nafter the payload allocation succeeds.\n\n(cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)",
  "id": "GHSA-v3g3-p6wj-rwgr",
  "modified": "2026-10-28T12:31:03Z",
  "published": "2026-10-28T12:31:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99118"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bb1858db453cd4250e3b633f5d2d09206024ca6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-99118 (GCVE-0-2026-99118)

Vulnerability from cvelistv5 – Published: 2026-10-28 10:34 – Updated: 2026-10-28 10:34

Title

drm/i915/dmc: Harden DMC firmware payload parsing

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/i915/dmc: Harden DMC firmware payload parsing Validate the conversion of the DMC firmware size from dwords to bytes using check_mul_overflow() before calculating the firmware payload size. Reject zero-length payloads and zero MMIO counts in the DMC firmware header so malformed firmware is caught early. Also set dmc_fw_size only after the payload allocation succeeds. (cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/dfcfe2874e7c16e84…
https://git.kernel.org/stable/c/05f7a2f712f8b287a…
https://git.kernel.org/stable/c/8bb1858db453cd425…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: eb805623d8b161342ed9c9caf366f0a295041a6d , < dfcfe2874e7c16e8460dc86ac1eeb54ea0e7f8aa (git) Affected: eb805623d8b161342ed9c9caf366f0a295041a6d , < 05f7a2f712f8b287a98ee61a7c2c6b72dad2fc6d (git) Affected: eb805623d8b161342ed9c9caf366f0a295041a6d , < 8bb1858db453cd4250e3b633f5d2d09206024ca6 (git)
Linux	Linux	Affected: 4.2 Unaffected: 0 , < 4.2 (semver) Unaffected: 6.18.59 , ≤ 6.18.* (semver) Unaffected: 7.2.13 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/i915/display/intel_dmc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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            },
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              "status": "affected",
              "version": "eb805623d8b161342ed9c9caf366f0a295041a6d",
              "versionType": "git"
            },
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              "status": "affected",
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          ]
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
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              "version": "0",
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            },
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            },
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              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.13",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.2",
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                },
                {
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                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/dmc: Harden DMC firmware payload parsing\n\nValidate the conversion of the DMC firmware size from dwords to bytes\nusing check_mul_overflow() before calculating the firmware payload size.\n\nReject zero-length payloads and zero MMIO counts in the DMC firmware\nheader so malformed firmware is caught early. Also set dmc_fw_size only\nafter the payload allocation succeeds.\n\n(cherry picked from commit efde6601a1f1daedfe3dcc2816c934ddb44e3eef)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T10:34:34.627Z",
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        {
          "url": "https://git.kernel.org/stable/c/8bb1858db453cd4250e3b633f5d2d09206024ca6"
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      "title": "drm/i915/dmc: Harden DMC firmware payload parsing",
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    "dateReserved": "2026-09-25T10:25:14.393Z",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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