CVE-2026-98846

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98846", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.373Z", "datePublished": "2026-10-18T15:50:34.714Z", "dateUpdated": "2026-10-30T12:40:09.817Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:40:09.817Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: check RCV_SHUTDOWN after the sendmsg connect wait\n\nsctp_wait_for_connect() drops the socket lock while it sleeps. An\nout-of-the-blue ABORT can then be processed from the socket backlog and\nunlink the association. If a concurrent shutdown(fd, SHUT_RD) sets\nRCV_SHUTDOWN, the waiter breaks with err == 0 before checking\nasoc->base.dead. Its final sctp_association_put() can then free the\nassociation, leaving sctp_sendmsg_to_asoc() to continue with a dangling\npointer.\n\nCheck RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc()\nbefore using the association again. The check only accesses the socket,\nso it needs no additional association reference. Return the existing\n-ESRCH so that sctp_sendmsg() skips freeing a new association that may\nalready have been destroyed.\n\nKeep sctp_wait_for_connect() unchanged to preserve its behavior for the\nconnect() caller."}], "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": "7f798168c54455559da0f7a377a23ab7019fec35", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "fe5a23c76fc48b711eb7d6f3462c994e34da36f9", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "1e7cd89975fa3b11ebd7e1bbb4648a71c0e0e2d4", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "1bef1944ef15a40797305bf916827b04df6307ca", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "e8f972b1759d26bbefe4c524caae1ed7c8a593bd", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "e701345d886e831fb593a0870d69c8c5de6fc938", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669", "status": "affected", "versionType": "git"}, {"version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "lessThan": "4f1da630d13de0370e2f6361f961f1c8b384af1c", "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": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7f798168c54455559da0f7a377a23ab7019fec35"}, {"url": "https://git.kernel.org/stable/c/fe5a23c76fc48b711eb7d6f3462c994e34da36f9"}, {"url": "https://git.kernel.org/stable/c/1e7cd89975fa3b11ebd7e1bbb4648a71c0e0e2d4"}, {"url": "https://git.kernel.org/stable/c/1bef1944ef15a40797305bf916827b04df6307ca"}, {"url": "https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd"}, {"url": "https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938"}, {"url": "https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669"}, {"url": "https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c"}], "title": "sctp: check RCV_SHUTDOWN after the sendmsg connect wait", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/sctp/socket.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "7f798168c54455559da0f7a377a23ab7019fec35", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "fe5a23c76fc48b711eb7d6f3462c994e34da36f9", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "1e7cd89975fa3b11ebd7e1bbb4648a71c0e0e2d4", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "1bef1944ef15a40797305bf916827b04df6307ca", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "e8f972b1759d26bbefe4c524caae1ed7c8a593bd", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "e701345d886e831fb593a0870d69c8c5de6fc938", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}, {"lessThan": "4f1da630d13de0370e2f6361f961f1c8b384af1c", "status": "affected", "version": "668c9beb9020d5834ee9e43c208190a07d2b1928", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/sctp/socket.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"lessThan": "4.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: check RCV_SHUTDOWN after the sendmsg connect wait\n\nsctp_wait_for_connect() drops the socket lock while it sleeps. An\nout-of-the-blue ABORT can then be processed from the socket backlog and\nunlink the association. If a concurrent shutdown(fd, SHUT_RD) sets\nRCV_SHUTDOWN, the waiter breaks with err == 0 before checking\nasoc->base.dead. Its final sctp_association_put() can then free the\nassociation, leaving sctp_sendmsg_to_asoc() to continue with a dangling\npointer.\n\nCheck RCV_SHUTDOWN along with the wait error in sctp_sendmsg_to_asoc()\nbefore using the association again. The check only accesses the socket,\nso it needs no additional association reference. Return the existing\n-ESRCH so that sctp_sendmsg() skips freeing a new association that may\nalready have been destroyed.\n\nKeep sctp_wait_for_connect() unchanged to preserve its behavior for the\nconnect() caller."}], "id": "CVE-2026-98846", "lastModified": "2026-10-30T13:21:30.343", "metrics": {}, "published": "2026-10-18T16:17:38.947", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1bef1944ef15a40797305bf916827b04df6307ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1e7cd89975fa3b11ebd7e1bbb4648a71c0e0e2d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4f1da630d13de0370e2f6361f961f1c8b384af1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f798168c54455559da0f7a377a23ab7019fec35"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e701345d886e831fb593a0870d69c8c5de6fc938"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8f972b1759d26bbefe4c524caae1ed7c8a593bd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe5a23c76fc48b711eb7d6f3462c994e34da36f9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: sctp: check RCV_SHUTDOWN after the sendmsg connect wait", "id": "2555197", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555197"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) subsystem. A race condition can occur when an SCTP socket is shut down concurrently while waiting for a connection, causing an association structure to be freed while still in use. A local user could exploit this flaw to trigger a use-after-free condition, resulting in a Denial of Service (DoS) via a system crash or potential privilege escalation."], "name": "CVE-2026-98846", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98846\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98846\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98846.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928, e8f972b1759d26bbefe4c524caae1ed7c8a593bd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928, e701345d886e831fb593a0870d69c8c5de6fc938)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928, 222c41e0f50f1d5028be9baf0e1dcfc0bfa7f669)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[668c9beb9020d5834ee9e43c208190a07d2b1928, 4f1da630d13de0370e2f6361f961f1c8b384af1c)"}}], "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": "4.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "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": "2026-10-18T21:15:14.283024+00:00", "updated": "2026-10-24T04:45:16.967786+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}