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FKIE_CVE-2026-80733

Vulnerability from fkie_nvd - Published: 2026-09-03 13:06 - Updated: 2026-09-03 13:06
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8a39a09ae4eaae04309e1e38ed6a1101d967496
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c8f256dc849205ccb2bd78bd99a3497b972b44e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2adc4e80b29e58b5162ae09f0f657a215806c8c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "97133c4d42654578fab95abe47359ebe784dde18",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "f625c742b33dc137c209dd13d1c5f12b1c18d71c",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "ad7fa2f411cb30f63d6725f111be134064cdb718",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "d2adc4e80b29e58b5162ae09f0f657a215806c8c",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "c8f256dc849205ccb2bd78bd99a3497b972b44e0",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "lessThan": "b8a39a09ae4eaae04309e1e38ed6a1101d967496",
              "status": "affected",
              "version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c91f81773cd4bbebfe744e9ab30a7ce093f9b930",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c8c30b2b17f2133e953850c547e3902c3a3d80e2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3fe207e4637a2e792c46a08666aa722f77d7f8f7",
              "versionType": "git"
            },
            {
              "lessThan": "3.15",
              "status": "affected",
              "version": "3.14.40",
              "versionType": "semver"
            },
            {
              "lessThan": "3.19",
              "status": "affected",
              "version": "3.18.13",
              "versionType": "semver"
            },
            {
              "lessThan": "3.20",
              "status": "affected",
              "version": "3.19.6",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.0"
            },
            {
              "lessThan": "4.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-80733",
  "lastModified": "2026-09-03T13:06:12.050",
  "metrics": {},
  "published": "2026-09-03T13:06:12.050",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b8a39a09ae4eaae04309e1e38ed6a1101d967496"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c8f256dc849205ccb2bd78bd99a3497b972b44e0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2adc4e80b29e58b5162ae09f0f657a215806c8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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