{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80733", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.789Z", "datePublished": "2026-09-03T08:21:50.136Z", "dateUpdated": "2026-09-03T08:21:50.136Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-03T08:21:50.136Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/sock.c"], "versions": [{"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "97133c4d42654578fab95abe47359ebe784dde18", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "f625c742b33dc137c209dd13d1c5f12b1c18d71c", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "ad7fa2f411cb30f63d6725f111be134064cdb718", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "d2adc4e80b29e58b5162ae09f0f657a215806c8c", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "c8f256dc849205ccb2bd78bd99a3497b972b44e0", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f", "status": "affected", "versionType": "git"}, {"version": "f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90", "lessThan": "b8a39a09ae4eaae04309e1e38ed6a1101d967496", "status": "affected", "versionType": "git"}, {"version": "c91f81773cd4bbebfe744e9ab30a7ce093f9b930", "status": "affected", "versionType": "git"}, {"version": "c8c30b2b17f2133e953850c547e3902c3a3d80e2", "status": "affected", "versionType": "git"}, {"version": "3fe207e4637a2e792c46a08666aa722f77d7f8f7", "status": "affected", "versionType": "git"}, {"version": "3.14.40", "lessThan": "3.15", "status": "affected", "versionType": "semver"}, {"version": "3.18.13", "lessThan": "3.19", "status": "affected", "versionType": "semver"}, {"version": "3.19.6", "lessThan": "3.20", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/sock.c"], "versions": [{"version": "4.0", "status": "affected"}, {"version": "0", "lessThan": "4.0", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "5.10.265"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.0", "versionEndExcluding": "7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19.6"}]}]}], "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"}}}}

{}

{"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"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,97133c4d42654578fab95abe47359ebe784dde18)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,f625c742b33dc137c209dd13d1c5f12b1c18d71c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,ad7fa2f411cb30f63d6725f111be134064cdb718)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,d2adc4e80b29e58b5162ae09f0f657a215806c8c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,c8f256dc849205ccb2bd78bd99a3497b972b44e0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90,b8a39a09ae4eaae04309e1e38ed6a1101d967496)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c91f81773cd4bbebfe744e9ab30a7ce093f9b930"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c8c30b2b17f2133e953850c547e3902c3a3d80e2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "3fe207e4637a2e792c46a08666aa722f77d7f8f7"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.14.40,3.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.18.13,3.19)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[3.19.6,3.20)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.265,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.216,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.183,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.152,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.104,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-03T12:30:03.812896+00:00", "updated": "2026-09-03T12:30:04.247972+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-589"]}