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CVE-2026-80634 netfilter: flowtable: avoid num_encaps underflow on bridge VLAN untag

🗓️ 28 Aug 2026 06:48:49Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

Linux kernel netfilter flowtable u8 underflow on bridge VLAN untag causes OOB stack read.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-80634
28 Aug 202606:48
cve
debiancve
Debian CVE
CVE-2026-80634
28 Aug 202606:48
debiancve
euvd
EUVD
EUVD-2026-67510
28 Aug 202606:48
euvd
nvd
NVD
CVE-2026-80634
28 Aug 202608:16
nvd
osv
OSV
DEBIAN-CVE-2026-80634
28 Aug 202608:16
osv
ptsecurity
Positive Technologies
PT-2026-82934
28 Aug 202600:00
ptsecurity
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/netfilter/nf_flow_table_path.c"
    ],
    "versions": [
      {
        "version": "e990cef6516daa4e1e236433579e333f74fd38cb",
        "lessThan": "2f55fa28011c97d6495d5787808db10a8c2d690d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e990cef6516daa4e1e236433579e333f74fd38cb",
        "lessThan": "e052f920773b73be49eb4d8702a9f85de7464363",
        "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/netfilter/nf_flow_table_path.c"
    ],
    "versions": [
      {
        "version": "5.13",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.13",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.5",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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