{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68300", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.380Z", "datePublished": "2026-08-10T12:02:34.168Z", "dateUpdated": "2026-08-10T12:02:34.168Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-10T12:02:34.168Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: auth: verify auth requirement when auth_chunk is NULL\n\nsctp_auth_chunk_verify() returns true unconditionally when\nchunk->auth_chunk is NULL, silently skipping authentication.\nThis is incorrect when:\n\n1. skb_clone() failed in the BH receive path, leaving auth_chunk\n NULL. In sctp_endpoint_bh_rcv() asoc is NULL for new\n connections, so the early sctp_auth_recv_cid() check cannot\n catch this.\n\n2. No AUTH chunk precedes COOKIE-ECHO, so skb_clone() is never\n called and auth_chunk remains NULL.\n\nFix by checking sctp_auth_recv_cid() when auth_chunk is NULL:\nif authentication is required, return false to drop the chunk;\notherwise continue normally."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/sm_statefuns.c"], "versions": [{"version": "bbd0d59809f923ea2b540cbd781b32110e249f6e", "lessThan": "ec2e157fc9678a9bc411305a25aec3fd337d7efb", "status": "affected", "versionType": "git"}, {"version": "bbd0d59809f923ea2b540cbd781b32110e249f6e", "lessThan": "28c5fdce9dd955d2baf5e28987819b6d7cfaf646", "status": "affected", "versionType": "git"}, {"version": "bbd0d59809f923ea2b540cbd781b32110e249f6e", "lessThan": "18957373920caf5cdaf5cf32e5d1d7a99ca7700a", "status": "affected", "versionType": "git"}, {"version": "bbd0d59809f923ea2b540cbd781b32110e249f6e", "lessThan": "83f5031f2a6a49d696eb4cc0898345d12f9c6451", "status": "affected", "versionType": "git"}, {"version": "bbd0d59809f923ea2b540cbd781b32110e249f6e", "lessThan": "8e04823c120b376ef7dab14b60ebf6823aa16c14", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/sm_statefuns.c"], "versions": [{"version": "2.6.24", "status": "affected"}, {"version": "0", "lessThan": "2.6.24", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc5", "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": "2.6.24", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.24", "versionEndExcluding": "7.2-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ec2e157fc9678a9bc411305a25aec3fd337d7efb"}, {"url": "https://git.kernel.org/stable/c/28c5fdce9dd955d2baf5e28987819b6d7cfaf646"}, {"url": "https://git.kernel.org/stable/c/18957373920caf5cdaf5cf32e5d1d7a99ca7700a"}, {"url": "https://git.kernel.org/stable/c/83f5031f2a6a49d696eb4cc0898345d12f9c6451"}, {"url": "https://git.kernel.org/stable/c/8e04823c120b376ef7dab14b60ebf6823aa16c14"}], "title": "sctp: auth: verify auth requirement when auth_chunk is NULL", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bbd0d59809f923ea2b540cbd781b32110e249f6e,ec2e157fc9678a9bc411305a25aec3fd337d7efb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bbd0d59809f923ea2b540cbd781b32110e249f6e,28c5fdce9dd955d2baf5e28987819b6d7cfaf646)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bbd0d59809f923ea2b540cbd781b32110e249f6e,18957373920caf5cdaf5cf32e5d1d7a99ca7700a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bbd0d59809f923ea2b540cbd781b32110e249f6e,83f5031f2a6a49d696eb4cc0898345d12f9c6451)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bbd0d59809f923ea2b540cbd781b32110e249f6e,8e04823c120b376ef7dab14b60ebf6823aa16c14)"}}], "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": "2.6.24"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.24)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "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": "2026-08-10T15:30:05.871790+00:00", "updated": "2026-08-10T21:15:07.037247+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-306"]}