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CVE-2026-80738 bpf: Check sk_state before sk_protocol in bpf_tcp_*_syncookie

🗓️ 03 Sep 2026 08:21:53Reported by LinuxType 
cve
 cve
🔗 www.cve.org👁 3 Views

Linux kernel bpf_tcp_*_syncookie dereferences fullsock fields on mini-sockets without state check.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
cvelist
Cvelist
CVE-2026-80738 bpf: Check sk_state before sk_protocol in bpf_tcp_*_syncookie
3 Sep 202608:21
cvelist
ptsecurity
Positive Technologies
PT-2026-84936
3 Sep 202600:00
ptsecurity
Vulners
CNA
Node
OR
linuxlinux_kernelRange5.27.1.9
linuxlinux_kernelRange7.2.0
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/filter.c"
    ],
    "versions": [
      {
        "version": "399040847084a69f345e0a52fd62f04654e0fce3",
        "lessThan": "23f682083aa3fbc0c49667818efd6979a8bc5ac2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "399040847084a69f345e0a52fd62f04654e0fce3",
        "lessThan": "31a420a822ff92e2090bd5d65efe8e34e2d6d9b8",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/filter.c"
    ],
    "versions": [
      {
        "version": "5.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.2",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.9",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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