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netfilter: nfnetlink_queue: hold nfnl mutex in event notifier

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: hold nfnl mutex in event notifier We must serialize the release notifier and the config netlink function. A concurrent thread can issue close() which can call the release function while unrelated socket processes UNBIND request for same portid: Oops: general protection fault, [..] RIP: 0010:__instance_destroy+0x60/0x210 [nfnetlink_queue] Call Trace: nfqnl_recv_config+0x9b0/0xdc0 [nfnetlink_queue] nfnetlink_rcv_msg+0x7c2/0xeb0 ? __pfx_nfnetlink_rcv_msg+0x10/0x10 After this, parallel UNBIND and URELEASE events are impossible. This change isn't nice, but its the shortest fix given instances are not refcounted and the nfnetlink config callback drops the rcu read lock early due to need for sleeping allocations.

Announced Source revision 1
Original source ↗

CVE-2026-98624

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98624

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "46432f2e76f7c385d82506304a2928e7d293289f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "597320337c3da06c92a9e95cfc755da66fedc476",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "2e9be1302f25c9be51c2fb8c907bc6d8a1050e33",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "d559e06a5ab7c064100aafd5c826eadd0f1c6216",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "1d1184411599a7c2217560bab3bbe641c6d03b95",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "8137a39e08e838ced234044384740ceeb99ed388",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb",
        "lessThan": "9461613afc59acef44a0071b0dd5075f6e993ffe",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/netfilter/nfnetlink_queue.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.14",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.271",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.222",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/netfilter/nfnetlink_queue.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98624

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#38644 · Revision 1
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Publisher date
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