Vulnerability-Lookup

FKIE_CVE-2026-80741

Vulnerability from fkie_nvd - Published: 2026-09-03 13:06 - Updated: 2026-09-04 05:17

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/log: Fix out-of-bounds read on empty message length drm_log_draw_kmsg_record() accesses s[len - 1] to strip the trailing newline, but len is unsigned int. If len is 0, the subtraction wraps to UINT_MAX, causing an out-of-bounds read. Add an early return when len is 0.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/16a2716910ecf7d31bf3c033ee7c506a0b00b2ee
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/16bcea56f4205314ec2aa04a7ec74e5261d253c7
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/60baa179ed1333535f6e2da4133511db55278ee4

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/clients/drm_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "16a2716910ecf7d31bf3c033ee7c506a0b00b2ee",
              "status": "affected",
              "version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
              "versionType": "git"
            },
            {
              "lessThan": "16bcea56f4205314ec2aa04a7ec74e5261d253c7",
              "status": "affected",
              "version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
              "versionType": "git"
            },
            {
              "lessThan": "60baa179ed1333535f6e2da4133511db55278ee4",
              "status": "affected",
              "version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/clients/drm_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/log: Fix out-of-bounds read on empty message length\n\ndrm_log_draw_kmsg_record() accesses s[len - 1] to strip the trailing\nnewline, but len is unsigned int. If len is 0, the subtraction wraps\nto UINT_MAX, causing an out-of-bounds read.\n\nAdd an early return when len is 0."
    }
  ],
  "id": "CVE-2026-80741",
  "lastModified": "2026-09-04T05:17:14.470",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-03T13:06:13.317",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16a2716910ecf7d31bf3c033ee7c506a0b00b2ee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16bcea56f4205314ec2aa04a7ec74e5261d253c7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/60baa179ed1333535f6e2da4133511db55278ee4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-80741 (GCVE-0-2026-80741)

Vulnerability from cvelistv5 – Published: 2026-09-03 08:26 – Updated: 2026-09-04 04:58

Title

drm/log: Fix out-of-bounds read on empty message length

Summary

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/16a2716910ecf7d31…
https://git.kernel.org/stable/c/16bcea56f4205314e…
https://git.kernel.org/stable/c/60baa179ed1333535…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 25e2c2a3eff55683bbe77b108db2a7e389246666 , < 16a2716910ecf7d31bf3c033ee7c506a0b00b2ee (git) Affected: 25e2c2a3eff55683bbe77b108db2a7e389246666 , < 16bcea56f4205314ec2aa04a7ec74e5261d253c7 (git) Affected: 25e2c2a3eff55683bbe77b108db2a7e389246666 , < 60baa179ed1333535f6e2da4133511db55278ee4 (git)
Linux	Linux	Affected: 6.14 Unaffected: 0 , < 6.14 (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/clients/drm_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "16a2716910ecf7d31bf3c033ee7c506a0b00b2ee",
              "status": "affected",
              "version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
              "versionType": "git"
            },
            {
              "lessThan": "16bcea56f4205314ec2aa04a7ec74e5261d253c7",
              "status": "affected",
              "version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
              "versionType": "git"
            },
            {
              "lessThan": "60baa179ed1333535f6e2da4133511db55278ee4",
              "status": "affected",
              "version": "25e2c2a3eff55683bbe77b108db2a7e389246666",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/clients/drm_log.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "lessThan": "6.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.46",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/log: Fix out-of-bounds read on empty message length\n\ndrm_log_draw_kmsg_record() accesses s[len - 1] to strip the trailing\nnewline, but len is unsigned int. If len is 0, the subtraction wraps\nto UINT_MAX, causing an out-of-bounds read.\n\nAdd an early return when len is 0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is in drm_log, an in-kernel DRM boot console that renders printk records to the framebuffer; it is only reached from the local printk/nbcon console path, not from any network protocol or physical bus.\nAC:L - Once CONFIG_DRM_CLIENT_LOG is active (common on embedded/kiosk displays), a local actor can drive printk/console output; if a zero-length record is delivered to drm_log_draw_kmsg_record(), the unsigned wrap to UINT_MAX makes the OOB read deterministic rather than race-dependent.\nPR:L - No root or DRM master is required to reach the console printk path; unprivileged local processes routinely trigger kernel logging via syscalls and /dev/kmsg (CAP_SYSLOG is obtainable in user namespaces), and drm_log only refuses to draw when a userspace DRM master is already held.\nUI:N - Exploitation does not require any victim to click, mount, or open a file; it is triggered automatically when the kernel console layer emits a qualifying (including zero-length) message to the drm_log nbcon handler.\nS:U - Impact stays within kernel context on the same machine (display logger crash/OOB read); it does not cross a VM, container, or IOMMU security boundary.\nC:H - With len=0, s[len-1] indexes s[UINT_MAX-1], an unbounded out-of-bounds kernel read; per kernel CVSS guidance, OOB reads are rated High even when the immediate fault dominates.\nI:N - The defect is a read-side integer underflow only; it does not corrupt or write adjacent memory and provides no direct arbitrary-write or code-execution primitive.\nA:H - Reading at offset UINT_MAX from the printk outbuf is virtually certain to fault the console thread with a kernel oops/panic, denying display and potentially halting the system on embedded drm_log deployments."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-04T04:58:24.919Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/16a2716910ecf7d31bf3c033ee7c506a0b00b2ee"
        },
        {
          "url": "https://git.kernel.org/stable/c/16bcea56f4205314ec2aa04a7ec74e5261d253c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/60baa179ed1333535f6e2da4133511db55278ee4"
        }
      ],
      "title": "drm/log: Fix out-of-bounds read on empty message length",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80741",
    "datePublished": "2026-09-03T08:26:25.322Z",
    "dateReserved": "2026-08-26T14:34:25.790Z",
    "dateUpdated": "2026-09-04T04:58:24.919Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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FKIE_CVE-2026-80741

CVE-2026-80741 (GCVE-0-2026-80741)

Tags

Sightings

Nomenclature