cve-2026-64080

{
  "cvss": 9.3,
  "datePublished": "2026-07-19T16:17:48.607",
  "dateUpdated": "2026-09-03T13:08:19.890",
  "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Snapshot notifier callbacks under lock\n\nBoth notification handlers currently look up a notifier callback under\nnotify_lock, drop the lock, and then dereference the returned\nnotifier entry. A concurrent unregister can delete and free that\nentry in the gap, leaving the handler to dereference stale memory.\n\nCopy the callback pointer and callback data while notify_lock is\nstill held and invoke the callback only after the lock is dropped.\nThis keeps the existing callback execution model while removing the\nuse-after-free window in both the framework and non-framework\nnotification paths.",
  "id": "CVE-2026-64080",
  "raw": {
    "affected": [
      {
        "affectedData": [
          {
            "defaultStatus": "unaffected",
            "product": "Linux",
            "programFiles": [
              "drivers/firmware/arm_ffa/driver.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "lessThan": "d1e38551fadea230649bc428f0f35c9ee062a072",
                "status": "affected",
                "version": "285a5ea0f542db94c3ed11e01a71abb47d15cbf5",
                "versionType": "git"
              },
              {
                "lessThan": "0e7be42ef2490f19d859a6146324d48cafdc9d5c",
                "status": "affected",
                "version": "285a5ea0f542db94c3ed11e01a71abb47d15cbf5",
                "versionType": "git"
              },
              {
                "lessThan": "38290b180a4d5746baed796d49f88d56d2f336cd",
                "status": "affected",
                "version": "285a5ea0f542db94c3ed11e01a71abb47d15cbf5",
                "versionType": "git"
              }
            ]
          },
          {
            "defaultStatus": "affected",
            "product": "Linux",
            "programFiles": [
              "drivers/firmware/arm_ffa/driver.c"
            ],
            "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
            "vendor": "Linux",
            "versions": [
              {
                "status": "affected",
                "version": "6.15"
              },
              {
                "lessThan": "6.15",
                "status": "unaffected",
                "version": "0",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "6.18.*",
                "status": "unaffected",
                "version": "6.18.34",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "7.0.*",
                "status": "unaffected",
                "version": "7.0.11",
                "versionType": "semver"
              },
              {
                "lessThanOrEqual": "*",
                "status": "unaffected",
                "version": "7.1",
                "versionType": "original_commit_for_fix"
              }
            ]
          }
        ],
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
      }
    ],
    "configurations": [
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                "matchCriteriaId": "89E9B97C-FD82-4D2E-8426-3A1A703B2ED7",
                "versionEndExcluding": "6.18.34",
                "versionStartIncluding": "6.15",
                "vulnerable": true
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    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Snapshot notifier callbacks under lock\n\nBoth notification handlers currently look up a notifier callback under\nnotify_lock, drop the lock, and then dereference the returned\nnotifier entry. A concurrent unregister can delete and free that\nentry in the gap, leaving the handler to dereference stale memory.\n\nCopy the callback pointer and callback data while notify_lock is\nstill held and invoke the callback only after the lock is dropped.\nThis keeps the existing callback execution model while removing the\nuse-after-free window in both the framework and non-framework\nnotification paths."
      }
    ],
    "id": "CVE-2026-64080",
    "lastModified": "2026-09-03T13:08:19.890",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.5,
          "impactScore": 6.0,
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "type": "Secondary"
        }
      ]
    },
    "published": "2026-07-19T16:17:48.607",
    "references": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/0e7be42ef2490f19d859a6146324d48cafdc9d5c"
      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
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      },
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "tags": [
          "Patch"
        ],
        "url": "https://git.kernel.org/stable/c/d1e38551fadea230649bc428f0f35c9ee062a072"
      }
    ],
    "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "vulnStatus": "Analyzed",
    "weaknesses": [
      {
        "description": [
          {
            "lang": "en",
            "value": "CWE-416"
          }
        ],
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "severity": "CRITICAL",
  "source": "nvd",
  "title": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_ffa: Snapshot notifier callbacks u..."
}