Vulnerability-Lookup

GHSA-5HJC-XC74-XXJG

Vulnerability from github – Published: 2026-07-24 18:31 – Updated: 2026-07-24 18:31

Details

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

fbdev: modedb: fix a possible UAF in fb_find_mode()

If mode_option is NULL, it is assigned from mode_option_buf:

if (!mode_option) { fb_get_options(NULL, &mode_option_buf); mode_option = mode_option_buf; }

Later, name is assigned from mode_option:

const char *name = mode_option;

However, mode_option_buf is freed before name is no longer used:

kfree(mode_option_buf);

while name is still accessed by:

if ((name_matches(db[i], name, namelen) ||

Since name aliases mode_option_buf, this may result in a use-after-free.

Fix this by extending the lifetime of mode_option_buf until the end of the function by using scope-based resource management for cleanup.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64245"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-24T16:16:53Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: modedb: fix a possible UAF in fb_find_mode()\n\nIf mode_option is NULL, it is assigned from mode_option_buf:\n\n  if (!mode_option) {\n    fb_get_options(NULL, \u0026mode_option_buf);\n    mode_option = mode_option_buf;\n  }\n\nLater, name is assigned from mode_option:\n\n  const char *name = mode_option;\n\nHowever, mode_option_buf is freed before name is no longer used:\n\n  kfree(mode_option_buf);\n\nwhile name is still accessed by:\n\n  if ((name_matches(db[i], name, namelen) ||\n\nSince name aliases mode_option_buf, this may result in a\nuse-after-free.\n\nFix this by extending the lifetime of mode_option_buf until the end of the\nfunction by using scope-based resource management for cleanup.",
  "id": "GHSA-5hjc-xc74-xxjg",
  "modified": "2026-07-24T18:31:28Z",
  "published": "2026-07-24T18:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64245"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/13b6f0cdd5cd5e60f682ec43134ab0e2024bd356"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d418cf8daf57e454b4d855bf9b2419fd8e6a540"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/85b6256469cebdac395e7447147e06b2e151014f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7dc382439f7b019e207055b52e9cec051d42fa9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f906347d75c7fc377041c6d3c535d0f08846aada"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64245 (GCVE-0-2026-64245)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:31 – Updated: 2026-07-27 04:37

Title

fbdev: modedb: fix a possible UAF in fb_find_mode()

Summary

In the Linux kernel, the following vulnerability has been resolved: fbdev: modedb: fix a possible UAF in fb_find_mode() If mode_option is NULL, it is assigned from mode_option_buf: if (!mode_option) { fb_get_options(NULL, &mode_option_buf); mode_option = mode_option_buf; } Later, name is assigned from mode_option: const char *name = mode_option; However, mode_option_buf is freed before name is no longer used: kfree(mode_option_buf); while name is still accessed by: if ((name_matches(db[i], name, namelen) || Since name aliases mode_option_buf, this may result in a use-after-free. Fix this by extending the lifetime of mode_option_buf until the end of the function by using scope-based resource management for cleanup.

Severity

No CVSS data available.

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/c7dc382439f7b019e…
https://git.kernel.org/stable/c/f906347d75c7fc377…
https://git.kernel.org/stable/c/4d418cf8daf57e454…
https://git.kernel.org/stable/c/13b6f0cdd5cd5e60f…
https://git.kernel.org/stable/c/85b6256469cebdac3…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 089d924d03d5c17b05d02992f57671ccfba1c4f0 , < c7dc382439f7b019e207055b52e9cec051d42fa9 (git) Affected: 089d924d03d5c17b05d02992f57671ccfba1c4f0 , < f906347d75c7fc377041c6d3c535d0f08846aada (git) Affected: 089d924d03d5c17b05d02992f57671ccfba1c4f0 , < 4d418cf8daf57e454b4d855bf9b2419fd8e6a540 (git) Affected: 089d924d03d5c17b05d02992f57671ccfba1c4f0 , < 13b6f0cdd5cd5e60f682ec43134ab0e2024bd356 (git) Affected: 089d924d03d5c17b05d02992f57671ccfba1c4f0 , < 85b6256469cebdac395e7447147e06b2e151014f (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.38 , ≤ 6.18.* (semver) Unaffected: 7.1.3 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/modedb.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "versionType": "git"
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              "versionType": "git"
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              "status": "affected",
              "version": "089d924d03d5c17b05d02992f57671ccfba1c4f0",
              "versionType": "git"
            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/video/fbdev/core/modedb.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.144",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.95",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.144",
                  "versionStartIncluding": "6.4",
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                },
                {
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: modedb: fix a possible UAF in fb_find_mode()\n\nIf mode_option is NULL, it is assigned from mode_option_buf:\n\n  if (!mode_option) {\n    fb_get_options(NULL, \u0026mode_option_buf);\n    mode_option = mode_option_buf;\n  }\n\nLater, name is assigned from mode_option:\n\n  const char *name = mode_option;\n\nHowever, mode_option_buf is freed before name is no longer used:\n\n  kfree(mode_option_buf);\n\nwhile name is still accessed by:\n\n  if ((name_matches(db[i], name, namelen) ||\n\nSince name aliases mode_option_buf, this may result in a\nuse-after-free.\n\nFix this by extending the lifetime of mode_option_buf until the end of the\nfunction by using scope-based resource management for cleanup."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-27T04:37:28.079Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/c7dc382439f7b019e207055b52e9cec051d42fa9"
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        },
        {
          "url": "https://git.kernel.org/stable/c/4d418cf8daf57e454b4d855bf9b2419fd8e6a540"
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        {
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        },
        {
          "url": "https://git.kernel.org/stable/c/85b6256469cebdac395e7447147e06b2e151014f"
        }
      ],
      "title": "fbdev: modedb: fix a possible UAF in fb_find_mode()",
      "x_generator": {
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      }
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64245",
    "datePublished": "2026-07-24T15:31:14.142Z",
    "dateReserved": "2026-07-19T15:36:31.772Z",
    "dateUpdated": "2026-07-27T04:37:28.079Z",
    "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.

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GHSA-5HJC-XC74-XXJG

CVE-2026-64245 (GCVE-0-2026-64245)

Tags

Sightings

Nomenclature