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CVE-2026-81000 net: tun: bound receive headroom

🗓️ 11 Sep 2026 19:42:54Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 7 Views

Linux kernel TUN driver OOB write from oversized headroom causing skb->data outside allocated head.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-81000
12 Sep 202601:30
circl
cve
CVE
CVE-2026-81000
11 Sep 202619:42
cve
euvd
EUVD
EUVD-2026-76323
11 Sep 202619:42
euvd
nvd
NVD
CVE-2026-81000
11 Sep 202620:19
nvd
ptsecurity
Positive Technologies
PT-2026-90130
11 Sep 202600:00
ptsecurity
redhatcve
RedhatCVE
CVE-2026-81000
11 Sep 202621:38
redhatcve
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/tun.c"
    ],
    "versions": [
      {
        "version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
        "lessThan": "379d85c7f25f3e05a428225e6b8a65613c6e9b9d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
        "lessThan": "e098d9cc8859614a7f7baebc96e32a5a16b18ed2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
        "lessThan": "0ada54ea63e48b9c1608e917ccb7dfadbe86db28",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eaea34b23c46bf17b4a5638be69ab3561854f34b",
        "lessThan": "447c9303942c439a117d9b76ce6d6e2116b38ee7",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/tun.c"
    ],
    "versions": [
      {
        "version": "4.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.6",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.109",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.50",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.4",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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