{"id":"CVE-2026-68320","revision":null,"records":[{"revision":"34c2b4d3ce5c48c0b57a56fa4442c205","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68320","aliases":[],"title":"sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid\n\nsctp_auth_ep_add_chunkid() uses SCTP_NUM_CHUNK_TYPES (20) as the\ncapacity limit for ep->auth_chunk_list, allowing it to hold up to\n20 chunk entries (param_hdr.length up to 24). However, the copy\ndestination asoc->c.auth_chunks in struct sctp_cookie is only\nSCTP_AUTH_MAX_CHUNKS (16) entries (20 bytes). When more than 16\nchunks are added, sctp_association_init() memcpy overflows the\ndestination by up to 4 bytes.\n\nFix by using SCTP_AUTH_MAX_CHUNKS as the capacity limit, matching\nthe destination capacity.","state":0,"publishedAt":"2026-08-10T12:02:55.144+00:00","modifiedAt":"2026-10-19T21:09:04.674+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/sctp/auth.c\"\n ],\n \"versions\": [\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"3d22a7da2e264f407c729f33a0a346ff76108bc6\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"6837c1c19a259518974cbc5a52017646e3906564\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"54bb4c03fa17cdcb157c26c33e60a78cf32960f5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"5a365f1e423444c5da7eb689a8661633dad43e48\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"886e28e14ab655012779016d251fef53d103aa12\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"11092d79eb2b7c0068382f72fc2416d1786bb2e0\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"b6ea3dda09eb4d5caf7bbc00f857688cf9e98255\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1f485649f52929d9937b346a920a522a7363e202\",\n \"lessThan\": \"ff04b26794a16a8a879eb4fd2c02c2d6b03850e9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/sctp/auth.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.24\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.24\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.265\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.216\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.183\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.148\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.101\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.42\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.6\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","score":7.3,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/3d22a7da2e264f407c729f33a0a346ff76108bc6","https://git.kernel.org/stable/c/6837c1c19a259518974cbc5a52017646e3906564","https://git.kernel.org/stable/c/54bb4c03fa17cdcb157c26c33e60a78cf32960f5","https://git.kernel.org/stable/c/5a365f1e423444c5da7eb689a8661633dad43e48","https://git.kernel.org/stable/c/886e28e14ab655012779016d251fef53d103aa12","https://git.kernel.org/stable/c/11092d79eb2b7c0068382f72fc2416d1786bb2e0","https://git.kernel.org/stable/c/b6ea3dda09eb4d5caf7bbc00f857688cf9e98255","https://git.kernel.org/stable/c/ff04b26794a16a8a879eb4fd2c02c2d6b03850e9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68320","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68320","identifiers":["CVE-2026-68320"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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