{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74469", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.902Z", "datePublished": "2026-08-15T12:27:06.873Z", "dateUpdated": "2026-08-17T05:47:30.846Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:47:30.846Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: prevent peer transport count overflow\n\nsctp_assoc_add_peer() increments the association's 16-bit transport_count\nfor every new unique peer. Adding the 65,536th transport wraps the count to\nzero.\n\nSCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload,\nthen copies one sockaddr_storage for every entry in transport_addr_list.\nAfter the wrap, a diagnostic dump reserves an empty payload and writes\n8 MiB of peer addresses past the skb tail.\n\nReject a new unique peer when transport_count has reached U16_MAX. Perform\nthe check after the existing-peer lookup so a duplicate address continues\nto return its existing transport at the limit."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - Remote SCTP peers add unique transports via INIT address parameters and ASCONF ADD_IP chunks processed in sctp_assoc_add_peer(); this is network ingress on SCTP servers (telecom, signaling gateways) before any local diagnostic action.\nAC:L - An attacker controlling an SCTP association can script 65536 unique peer addresses via connectx, repeated ASCONF ADD_IP, or INIT parameters; no race or victim-specific state is required beyond reaching the transport limit.\nPR:L - The heap overflow is triggered via NETLINK_SOCK_DIAG (ss/netlink), reachable by unprivileged users; SCTP socket creation and connectx need no capabilities beyond a normal local account (including user namespaces).\nUI:N - Exploitation requires no victim interaction; the attacker drives transport accumulation and issues the diagnostic dump themselves.\nS:U - Impact is kernel heap corruption within the same kernel security boundary; this is not a VM escape, sandbox breakout, or cross-authority scope change.\nC:H - When transport_count wraps to zero, inet_diag_msg_sctpaddrs_fill() reserves no space but iterates all 65536 transports, writing ~8 MiB past the skb tail and enabling adjacent kernel heap reads.\nI:H - The same diag path performs a massive out-of-bounds write of sockaddr_storage entries past the allocated skb buffer, corrupting adjacent kernel heap objects and enabling control-flow hijacking.\nA:H - Corrupting sk_buff heap metadata and adjacent allocations via an ~8 MiB out-of-bounds write can cause kernel oops, panic, or hang, meeting high availability impact."}]}], "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": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "546221b86ceeba0d8fec92d46a0604bb7b62be07", "status": "affected", "versionType": "git"}, {"version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "09e722030e8148ba4ed1e42c6b2ea57bda9f9895", "status": "affected", "versionType": "git"}, {"version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0", "status": "affected", "versionType": "git"}, {"version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75", "status": "affected", "versionType": "git"}, {"version": "8f840e47f190cbe61a96945c13e9551048d42cef", "lessThan": "bd0e9289e2642f6a5c54faad304ce0f41e926d22", "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": "4.7", "status": "affected"}, {"version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "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": "4.7", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07"}, {"url": "https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895"}, {"url": "https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0"}, {"url": "https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75"}, {"url": "https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22"}], "title": "sctp: prevent peer transport count overflow", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"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": "546221b86ceeba0d8fec92d46a0604bb7b62be07", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "09e722030e8148ba4ed1e42c6b2ea57bda9f9895", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "versionType": "git"}, {"lessThan": "bd0e9289e2642f6a5c54faad304ce0f41e926d22", "status": "affected", "version": "8f840e47f190cbe61a96945c13e9551048d42cef", "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": "4.7"}, {"lessThan": "4.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.151", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "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: prevent peer transport count overflow\n\nsctp_assoc_add_peer() increments the association's 16-bit transport_count\nfor every new unique peer. Adding the 65,536th transport wraps the count to\nzero.\n\nSCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload,\nthen copies one sockaddr_storage for every entry in transport_addr_list.\nAfter the wrap, a diagnostic dump reserves an empty payload and writes\n8 MiB of peer addresses past the skb tail.\n\nReject a new unique peer when transport_count has reached U16_MAX. Perform\nthe check after the existing-peer lookup so a duplicate address continues\nto return its existing transport at the limit."}], "id": "CVE-2026-74469", "lastModified": "2026-08-17T06:19:42.860", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T13:17:51.623", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}