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CVE-2026-89791 perf: Fix use-after-free when perf mmap() revival races with the last munmap()

🗓️ 16 Sep 2026 08:48:27Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 6 Views

Local privilege escalation in Linux kernel perf use-after-free via mmap/munmap race.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-89791
16 Sep 202608:48
cve
debiancve
Debian CVE
CVE-2026-89791
16 Sep 202608:48
debiancve
euvd
EUVD
EUVD-2026-80312
16 Sep 202608:48
euvd
nvd
NVD
CVE-2026-89791
16 Sep 202609:17
nvd
osv
OSV
DEBIAN-CVE-2026-89791
16 Sep 202609:17
osv
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/events/core.c"
    ],
    "versions": [
      {
        "version": "59741451b49ce9964a9758c19d6f7df2a1255c75",
        "lessThan": "929cb3b9dc818dd9fa89d510d4ff2b255e42badd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "59741451b49ce9964a9758c19d6f7df2a1255c75",
        "lessThan": "0c739f54f1c77f3a4643160cd2e031b6c2f2aab6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "59741451b49ce9964a9758c19d6f7df2a1255c75",
        "lessThan": "58a8108bc73de0740d5b88150465d6690ea5f85f",
        "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/events/core.c"
    ],
    "versions": [
      {
        "version": "6.18",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.18",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.52",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.5",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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16 Sep 2026 14:38Current
CVSS 3.17.8
EPSS0.00189
6