298 lines
15 KiB
JSON
298 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74469",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.902Z",
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"datePublished": "2026-08-15T12:27:06.873Z",
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"dateUpdated": "2026-10-16T19:05:47.493Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-19T16:37:15.198Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sctp/associola.c"
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],
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"versions": [
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "b453e00da1211e997b82743d28af7714c59c05c8",
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"status": "affected",
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},
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "dfea32dd76f390e3155177b0038cc47b01386198",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "80f48523a0fe42db2e7375dff4e38a25c117090a",
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"status": "affected",
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{
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"lessThan": "546221b86ceeba0d8fec92d46a0604bb7b62be07",
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"status": "affected",
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},
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "09e722030e8148ba4ed1e42c6b2ea57bda9f9895",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "8f840e47f190cbe61a96945c13e9551048d42cef",
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"lessThan": "bd0e9289e2642f6a5c54faad304ce0f41e926d22",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/sctp/associola.c"
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],
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"versions": [
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{
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"version": "4.7",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.7",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.265",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.216",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.151",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.103",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.44",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"cpeMatch": [
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"versionStartIncluding": "4.7",
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"references": [
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"url": "https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198"
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},
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{
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"url": "https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a"
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},
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{
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"url": "https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07"
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{
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"url": "https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895"
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},
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{
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"url": "https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0"
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{
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"url": "https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75"
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{
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"url": "https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22"
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}
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],
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"title": "sctp: prevent peer transport count overflow",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-74469",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T18:57:13.238914Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:05:47.493Z"
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}
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}
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]
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}
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} |