CVE-2026-80733 (GCVE-0-2026-80733)
Vulnerability from cvelistv5
Published
2026-09-03 08:21
Modified
2026-09-03 08:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: net: remove WARN_ON_ONCE() from sk_mc_loop() sk_mc_loop() can be called for sockets that are neither AF_INET nor AF_INET6 (e.g. AF_PACKET sockets when sending packets via raw/packet socket over virtual devices such as VRF or ipvlan). In such cases, sk_family is not AF_INET/AF_INET6 and sk_mc_loop() falls through the switch statement and triggers WARN_ON_ONCE(1). Non-INET sockets do not support IP_MULTICAST_LOOP or IPV6_MULTICAST_LOOP options, so loopback should default to true without generating a warning.
References
Impacted products
Vendor Product Version
Linux Linux Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90
Version: c91f81773cd4bbebfe744e9ab30a7ce093f9b930
Version: c8c30b2b17f2133e953850c547e3902c3a3d80e2
Version: 3fe207e4637a2e792c46a08666aa722f77d7f8f7
Version: 3.14.40   ≤
Version: 3.18.13   ≤
Version: 3.19.6   ≤
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{
  "containers": {
    "cna": {
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        {
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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            {
              "lessThanOrEqual": "6.1.*",
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              "version": "6.1.183",
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE() from sk_mc_loop()\n\nsk_mc_loop() can be called for sockets that are neither AF_INET\nnor AF_INET6 (e.g. AF_PACKET sockets when sending packets via raw/packet\nsocket over virtual devices such as VRF or ipvlan).\n\nIn such cases, sk_family is not AF_INET/AF_INET6 and sk_mc_loop() falls\nthrough the switch statement and triggers WARN_ON_ONCE(1).\n\nNon-INET sockets do not support IP_MULTICAST_LOOP or IPV6_MULTICAST_LOOP\noptions, so loopback should default to true without generating a warning."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-03T08:21:50.136Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18"
        },
        {
          "url": "https://git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718"
        },
        {
          "url": "https://git.kernel.org/stable/c/d2adc4e80b29e58b5162ae09f0f657a215806c8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe"
        },
        {
          "url": "https://git.kernel.org/stable/c/c8f256dc849205ccb2bd78bd99a3497b972b44e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f"
        },
        {
          "url": "https://git.kernel.org/stable/c/b8a39a09ae4eaae04309e1e38ed6a1101d967496"
        }
      ],
      "title": "net: remove WARN_ON_ONCE() from sk_mc_loop()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80733",
    "datePublished": "2026-09-03T08:21:50.136Z",
    "dateReserved": "2026-08-26T14:34:25.789Z",
    "dateUpdated": "2026-09-03T08:21:50.136Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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