CVE-2026-53349

🗓️ 01 Jul 2026 13:32:27Reported by LinuxType

CVE-2026-53349 concerns the Linux kernel netfilter nf_conntrack component where a stale exp->expectfn pointer can survive module removal (e.g., nf_nat_h323) and be invoked later, causing a crash (Oops) in init_conntrack when a connection arrive...

Reporter	Title	Published	Views	Family All 8
ATTACKERKB	CVE-2026-53349	1 Jul 202613:32	–	attackerkb
Circl	CVE-2026-53349	1 Jul 202622:47	–	circl
Cvelist	CVE-2026-53349 netfilter: nf_conntrack: destroy stale expectfn expectations on unregister	1 Jul 202613:32	–	cvelist
Debian CVE	CVE-2026-53349	1 Jul 202613:32	–	debiancve
EUVD	EUVD-2026-40983	1 Jul 202613:32	–	euvd
NVD	CVE-2026-53349	1 Jul 202614:16	–	nvd
OSV	DEBIAN-CVE-2026-53349	1 Jul 202619:48	–	osv
RedhatCVE	CVE-2026-53349	1 Jul 202619:42	–	redhatcve

Vulners

CNA

Node

linux linux_kernelRange2.6.20–6.1.176

linux linux_kernelRange6.2.0–6.6.143

linux linux_kernelRange6.7.0–6.12.94

linux linux_kernelRange6.13.0–6.18.36

linux linux_kernelRange6.19.0–7.0.13

linux linux_kernelRange7.1.0≥

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/netfilter/nf_conntrack_helper.h",
      "net/ipv4/netfilter/nf_nat_h323.c",
      "net/netfilter/nf_conntrack_helper.c",
      "net/netfilter/nf_nat_core.c",
      "net/netfilter/nf_nat_sip.c"
    ],
    "versions": [
      {
        "version": "f587de0e2feb9eb9b94f98d0a7b7437e4d6617b4",
        "lessThan": "fbfde85308b99938a6092c48753214d190ece48d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f587de0e2feb9eb9b94f98d0a7b7437e4d6617b4",
        "lessThan": "29d8cc44bbdf7b83a1929912214afe6643c1b4f1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f587de0e2feb9eb9b94f98d0a7b7437e4d6617b4",
        "lessThan": "f92c90a2a3e6ff6f9f7fe88fde9004b4ca8f956d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f587de0e2feb9eb9b94f98d0a7b7437e4d6617b4",
        "lessThan": "9d017671dcfcec23321fb7962dea624f9e71ddb1",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f587de0e2feb9eb9b94f98d0a7b7437e4d6617b4",
        "lessThan": "bf8c0b5dd203be94c2ad50e264cec19267c6bd39",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f587de0e2feb9eb9b94f98d0a7b7437e4d6617b4",
        "lessThan": "c3009418f9fa1dcb3eb86f4d8c92583537b5faa3",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "include/net/netfilter/nf_conntrack_helper.h",
      "net/ipv4/netfilter/nf_nat_h323.c",
      "net/netfilter/nf_conntrack_helper.c",
      "net/netfilter/nf_nat_core.c",
      "net/netfilter/nf_nat_sip.c"
    ],
    "versions": [
      {
        "version": "2.6.20",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.20",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.1.176",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.143",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.94",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.36",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0.13",
        "lessThanOrEqual": "7.0.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

Source	Link
git	www.git.kernel.org/stable/c/f92c90a2a3e6ff6f9f7fe88fde9004b4ca8f956d
git	www.git.kernel.org/stable/c/fbfde85308b99938a6092c48753214d190ece48d
git	www.git.kernel.org/stable/c/9d017671dcfcec23321fb7962dea624f9e71ddb1
git	www.git.kernel.org/stable/c/29d8cc44bbdf7b83a1929912214afe6643c1b4f1
git	www.git.kernel.org/stable/c/bf8c0b5dd203be94c2ad50e264cec19267c6bd39
git	www.git.kernel.org/stable/c/c3009418f9fa1dcb3eb86f4d8c92583537b5faa3

01 Jul 2026 14:16Current

5.9Medium risk

Vulners AI Score5.9