{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74688", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.926Z", "datePublished": "2026-08-22T15:32:53.423Z", "dateUpdated": "2026-08-22T15:32:53.423Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:32:53.423Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: clear control chunk transport if it is being removed\n\nsctp_make_heartbeat_ack() caches the destination transport in\nchunk->transport without taking a reference. When src_out_of_asoc_ok is\nenabled, the HEARTBEAT ACK may remain queued on control_chunk_list instead\nof being transmitted immediately.\n\nIf the peer transport is removed while the chunk is still queued,\nsctp_assoc_rm_peer() drops the transport and schedules it for RCU freeing,\nbut only clears cached transport pointers in out_chunk_list. The queued\ncontrol chunk therefore retains a dangling transport pointer.\n\nOnce an ASCONF_ACK clears the suppression and the queued control chunk is\ntransmitted, SCTP dereferences the stale transport pointer, leading to a\nuse-after-free.\n\nFix this by also clearing chunk->transport for queued control chunks in\ncontrol_chunk_list when removing the transport."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/associola.c"], "versions": [{"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "fad4766a74220fe579c6fcaa10ba01c23529814f", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "936658ec41c28c397ef390140e02d4c91ade92f0", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "8de65194a04d2552cd39b6c67d942d490f22d174", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "6160e756db81d6cb63e3e2952efcf6c5134be385", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "18d704bdd809377dfd81a3c2f42426763b5da227", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7", "status": "affected", "versionType": "git"}, {"version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "lessThan": "c9158ceaf27780ef64534ad72f44ffde3f8ccc49", "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/associola.c"], "versions": [{"version": "3.1", "status": "affected"}, {"version": "0", "lessThan": "3.1", "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": "3.1", "versionEndExcluding": "5.10.265"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.6.152"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.12.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "6.18.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886"}, {"url": "https://git.kernel.org/stable/c/fad4766a74220fe579c6fcaa10ba01c23529814f"}, {"url": "https://git.kernel.org/stable/c/936658ec41c28c397ef390140e02d4c91ade92f0"}, {"url": "https://git.kernel.org/stable/c/8de65194a04d2552cd39b6c67d942d490f22d174"}, {"url": "https://git.kernel.org/stable/c/6160e756db81d6cb63e3e2952efcf6c5134be385"}, {"url": "https://git.kernel.org/stable/c/18d704bdd809377dfd81a3c2f42426763b5da227"}, {"url": "https://git.kernel.org/stable/c/4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7"}, {"url": "https://git.kernel.org/stable/c/c9158ceaf27780ef64534ad72f44ffde3f8ccc49"}], "title": "sctp: clear control chunk transport if it is being removed", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sctp/associola.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "fad4766a74220fe579c6fcaa10ba01c23529814f", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "936658ec41c28c397ef390140e02d4c91ade92f0", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "8de65194a04d2552cd39b6c67d942d490f22d174", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "6160e756db81d6cb63e3e2952efcf6c5134be385", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "18d704bdd809377dfd81a3c2f42426763b5da227", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}, {"lessThan": "c9158ceaf27780ef64534ad72f44ffde3f8ccc49", "status": "affected", "version": "8a07eb0a50aebc8c95478d49c28c7f8419a26cef", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sctp/associola.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.1"}, {"lessThan": "3.1", "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\nsctp: clear control chunk transport if it is being removed\n\nsctp_make_heartbeat_ack() caches the destination transport in\nchunk->transport without taking a reference. When src_out_of_asoc_ok is\nenabled, the HEARTBEAT ACK may remain queued on control_chunk_list instead\nof being transmitted immediately.\n\nIf the peer transport is removed while the chunk is still queued,\nsctp_assoc_rm_peer() drops the transport and schedules it for RCU freeing,\nbut only clears cached transport pointers in out_chunk_list. The queued\ncontrol chunk therefore retains a dangling transport pointer.\n\nOnce an ASCONF_ACK clears the suppression and the queued control chunk is\ntransmitted, SCTP dereferences the stale transport pointer, leading to a\nuse-after-free.\n\nFix this by also clearing chunk->transport for queued control chunks in\ncontrol_chunk_list when removing the transport."}], "id": "CVE-2026-74688", "lastModified": "2026-08-22T16:16:43.180", "metrics": {}, "published": "2026-08-22T16:16:43.180", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18d704bdd809377dfd81a3c2f42426763b5da227"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6160e756db81d6cb63e3e2952efcf6c5134be385"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8de65194a04d2552cd39b6c67d942d490f22d174"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/936658ec41c28c397ef390140e02d4c91ade92f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c9158ceaf27780ef64534ad72f44ffde3f8ccc49"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fad4766a74220fe579c6fcaa10ba01c23529814f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,fad4766a74220fe579c6fcaa10ba01c23529814f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,936658ec41c28c397ef390140e02d4c91ade92f0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,8de65194a04d2552cd39b6c67d942d490f22d174)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,6160e756db81d6cb63e3e2952efcf6c5134be385)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,18d704bdd809377dfd81a3c2f42426763b5da227)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8a07eb0a50aebc8c95478d49c28c7f8419a26cef,c9158ceaf27780ef64534ad72f44ffde3f8ccc49)"}}], "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": "generic", "value": "3.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.1)"}}, {"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": "[6.18.45,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.9,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-08-22T19:00:14.810764+00:00", "updated": "2026-08-22T20:45:02.452839+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}