{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63971", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.024Z", "datePublished": "2026-07-19T14:55:57.792Z", "dateUpdated": "2026-07-20T13:41:56.086Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:41:56.086Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix race between sctp_wait_for_connect and peeloff\n\nsctp_wait_for_connect() drops and re-acquires the socket lock while\nwaiting for the association to reach ESTABLISHED state. During this\nwindow, another thread can peeloff the association to a new socket via\ngetsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After\nre-acquiring the old socket lock, sctp_wait_for_connect() returns\nsuccess without noticing the migration \u2014 the caller then accesses\nthe association under the wrong lock in sctp_datamsg_from_user().\n\nAdd the same sk != asoc->base.sk check that sctp_wait_for_sndbuf()\nalready has, returning an error if the association was migrated while\nwe slept."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sctp/socket.c"], "versions": [{"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "bcfeac79af740735ace44008b4a11b8e5add20f5", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "8e9b56051d24540cfbf39194618708c4a7633549", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "634a9af8a26a84d8b0d7b3b643204b344b42d9fb", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "7d2038d4b80166f7bead8d07eba3b97405816c21", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "68667ee4c7dadf7f63167234e2a1af09b3f7874e", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "6140cfa721451fa6e18e134e709703c2bf34d0fb", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "f14fe6395a8b3d961a61e138ad7b36ba3626dd4e", "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/socket.c"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "4.16", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d"}, {"url": "https://git.kernel.org/stable/c/bcfeac79af740735ace44008b4a11b8e5add20f5"}, {"url": "https://git.kernel.org/stable/c/8e9b56051d24540cfbf39194618708c4a7633549"}, {"url": "https://git.kernel.org/stable/c/634a9af8a26a84d8b0d7b3b643204b344b42d9fb"}, {"url": "https://git.kernel.org/stable/c/7d2038d4b80166f7bead8d07eba3b97405816c21"}, {"url": "https://git.kernel.org/stable/c/68667ee4c7dadf7f63167234e2a1af09b3f7874e"}, {"url": "https://git.kernel.org/stable/c/6140cfa721451fa6e18e134e709703c2bf34d0fb"}, {"url": "https://git.kernel.org/stable/c/f14fe6395a8b3d961a61e138ad7b36ba3626dd4e"}], "title": "sctp: fix race between sctp_wait_for_connect and peeloff", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{}

{"bugzilla": {"description": "kernel: sctp: fix race between sctp_wait_for_connect and peeloff", "id": "2502331", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502331"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-367", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsctp: fix race between sctp_wait_for_connect and peeloff\nsctp_wait_for_connect() drops and re-acquires the socket lock while\nwaiting for the association to reach ESTABLISHED state. During this\nwindow, another thread can peeloff the association to a new socket via\ngetsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After\nre-acquiring the old socket lock, sctp_wait_for_connect() returns\nsuccess without noticing the migration \u2014 the caller then accesses\nthe association under the wrong lock in sctp_datamsg_from_user().\nAdd the same sk != asoc->base.sk check that sctp_wait_for_sndbuf()\nalready has, returning an error if the association was migrated while\nwe slept.", "A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. A race condition exists in the sctp_wait_for_connect() function, where a socket lock is temporarily released and re-acquired. During this brief period, another process can move the SCTP association to a different socket. This can cause subsequent operations to access memory incorrectly, potentially leading to system instability or denial of service."], "name": "CVE-2026-63971", "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63971\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63971\nhttps://lore.kernel.org/linux-cve-announce/2026071959-CVE-2026-63971-dd46@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,0e0d5bc76fd4267a71334fcc8f1a5fbcf997845d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,bcfeac79af740735ace44008b4a11b8e5add20f5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,8e9b56051d24540cfbf39194618708c4a7633549)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,634a9af8a26a84d8b0d7b3b643204b344b42d9fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb7020d5834ee9e43c208190a07d2b1928,7d2038d4b80166f7bead8d07eba3b97405816c21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,68667ee4c7dadf7f63167234e2a1af09b3f7874e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,6140cfa721451fa6e18e134e709703c2bf34d0fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928,f14fe6395a8b3d961a61e138ad7b36ba3626dd4e)"}}], "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": "4.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.259,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.210,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T06:00:01.941954+00:00", "updated": "2026-07-21T23:00:05.168954+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-165"]}