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CVE-2026-80775 futex: Fix race on the initial mm->futex.phash.ref allocation

🗓️ 04 Sep 2026 15:12:47Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 45 Views

Race in Linux kernel futex on nested vfork causes use-after-free in futex_q_lock via freed memory.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/futex/core.c"
    ],
    "versions": [
      {
        "version": "d9b05321e21e4b218de4ce8a590bf375f58b6346",
        "lessThan": "86d12b34bafc9a4c271a9edefea88855a934d6e5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d9b05321e21e4b218de4ce8a590bf375f58b6346",
        "lessThan": "ff252ed45c8263525f2f54d81c5fa6d547fba344",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d9b05321e21e4b218de4ce8a590bf375f58b6346",
        "lessThan": "c4b4972d8edcdf50b6518f55119e129d2f668a10",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "d9b05321e21e4b218de4ce8a590bf375f58b6346",
        "lessThan": "bde0238083647381d4747355c5a19115a3422b96",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/futex/core.c"
    ],
    "versions": [
      {
        "version": "6.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.47",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.11",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.1",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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