{"api_version":"1","generated_at":"2026-08-28T06:47:57+00:00","cve":"CVE-2026-74469","urls":{"html":"https://cve.report/CVE-2026-74469","api":"https://cve.report/api/cve/CVE-2026-74469.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74469","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74469"},"summary":{"title":"sctp: prevent peer transport count overflow","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:17:51","updated_at":"2026-08-19 17:21:03"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"8.8","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75","name":"https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07","name":"https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0","name":"https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895","name":"https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b453e00da1211e997b82743d28af7714c59c05c8","name":"https://git.kernel.org/stable/c/b453e00da1211e997b82743d28af7714c59c05c8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198","name":"https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22","name":"https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a","name":"https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74469","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74469","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8f840e47f190cbe61a96945c13e9551048d42cef b453e00da1211e997b82743d28af7714c59c05c8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8f840e47f190cbe61a96945c13e9551048d42cef dfea32dd76f390e3155177b0038cc47b01386198 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8f840e47f190cbe61a96945c13e9551048d42cef 80f48523a0fe42db2e7375dff4e38a25c117090a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8f840e47f190cbe61a96945c13e9551048d42cef 546221b86ceeba0d8fec92d46a0604bb7b62be07 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"74469","cve":"CVE-2026-74469","epss":"0.004150000","percentile":"0.347770000","score_date":"2026-08-19","updated_at":"2026-08-20 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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":{"baseScore":8.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"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."}]}],"providerMetadata":{"dateUpdated":"2026-08-19T16:37:15.198Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b453e00da1211e997b82743d28af7714c59c05c8"},{"url":"https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198"},{"url":"https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a"},{"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74469","datePublished":"2026-08-15T12:27:06.873Z","dateReserved":"2026-08-15T05:44:03.902Z","dateUpdated":"2026-08-19T16:37:15.198Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:17:51","lastModifiedDate":"2026-08-19 17:21:03","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74469","Ordinal":"1","Title":"sctp: prevent peer transport count overflow","CVE":"CVE-2026-74469","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74469","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"sctp: prevent peer transport count overflow"}]}}}