{"api_version":"1","generated_at":"2026-08-10T22:55:24+00:00","cve":"CVE-2026-68376","urls":{"html":"https://cve.report/CVE-2026-68376","api":"https://cve.report/api/cve/CVE-2026-68376.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68376","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68376"},"summary":{"title":"sctp: fix auth_hmacs array size in struct sctp_cookie","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix auth_hmacs array size in struct sctp_cookie\n\nThe auth_hmacs array in struct sctp_cookie is supposed to store a complete\nSCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr\nfollowed by N HMAC identifiers.\n\nHowever, the array size was calculated using an extra 2 bytes instead of\nsizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers\nare configured, the HMAC-ALGO parameter stored in the endpoint is larger\nthan the auth_hmacs buffer in the cookie.\n\nAs a result, sctp_association_init() copies beyond the end of auth_hmacs\nwhen initializing the association, corrupting the adjacent auth_chunks\nfield. This can lead to an invalid HMAC identifier being accepted and later\ncause an out-of-bounds read in sctp_auth_get_hmac().\n\nFix the array size calculation by including the full SCTP parameter header\nsize.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:30","updated_at":"2026-08-10 13:20:30"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/0b4414e43e0861d67276031cc21401d7e87de3da","name":"https://git.kernel.org/stable/c/0b4414e43e0861d67276031cc21401d7e87de3da","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3aa40c3bccac2312ea7cf97f329190637f972b5d","name":"https://git.kernel.org/stable/c/3aa40c3bccac2312ea7cf97f329190637f972b5d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","name":"https://git.kernel.org/stable/c/a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","name":"https://git.kernel.org/stable/c/d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","name":"https://git.kernel.org/stable/c/e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68376","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68376","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f485649f52929d9937b346a920a522a7363e202 0b4414e43e0861d67276031cc21401d7e87de3da git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f485649f52929d9937b346a920a522a7363e202 d0a59ba58578e2b330fff80a44fe519f3ba7d8c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f485649f52929d9937b346a920a522a7363e202 a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f485649f52929d9937b346a920a522a7363e202 3aa40c3bccac2312ea7cf97f329190637f972b5d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1f485649f52929d9937b346a920a522a7363e202 e0b5252a59383b77d1b8dbeda00b7184dd95f4d3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.24","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.24 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc4 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"0b4414e43e0861d67276031cc21401d7e87de3da","status":"affected","version":"1f485649f52929d9937b346a920a522a7363e202","versionType":"git"},{"lessThan":"d0a59ba58578e2b330fff80a44fe519f3ba7d8c7","status":"affected","version":"1f485649f52929d9937b346a920a522a7363e202","versionType":"git"},{"lessThan":"a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db","status":"affected","version":"1f485649f52929d9937b346a920a522a7363e202","versionType":"git"},{"lessThan":"3aa40c3bccac2312ea7cf97f329190637f972b5d","status":"affected","version":"1f485649f52929d9937b346a920a522a7363e202","versionType":"git"},{"lessThan":"e0b5252a59383b77d1b8dbeda00b7184dd95f4d3","status":"affected","version":"1f485649f52929d9937b346a920a522a7363e202","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/sctp/structs.h"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.24"},{"lessThan":"2.6.24","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc4","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"2.6.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"2.6.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"2.6.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"2.6.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc4","versionStartIncluding":"2.6.24","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix auth_hmacs array size in struct sctp_cookie\n\nThe auth_hmacs array in struct sctp_cookie is supposed to store a complete\nSCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr\nfollowed by N HMAC identifiers.\n\nHowever, the array size was calculated using an extra 2 bytes instead of\nsizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers\nare configured, the HMAC-ALGO parameter stored in the endpoint is larger\nthan the auth_hmacs buffer in the cookie.\n\nAs a result, sctp_association_init() copies beyond the end of auth_hmacs\nwhen initializing the association, corrupting the adjacent auth_chunks\nfield. This can lead to an invalid HMAC identifier being accepted and later\ncause an out-of-bounds read in sctp_auth_get_hmac().\n\nFix the array size calculation by including the full SCTP parameter header\nsize."}],"providerMetadata":{"dateUpdated":"2026-08-10T12:03:54.666Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/0b4414e43e0861d67276031cc21401d7e87de3da"},{"url":"https://git.kernel.org/stable/c/d0a59ba58578e2b330fff80a44fe519f3ba7d8c7"},{"url":"https://git.kernel.org/stable/c/a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db"},{"url":"https://git.kernel.org/stable/c/3aa40c3bccac2312ea7cf97f329190637f972b5d"},{"url":"https://git.kernel.org/stable/c/e0b5252a59383b77d1b8dbeda00b7184dd95f4d3"}],"title":"sctp: fix auth_hmacs array size in struct sctp_cookie","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68376","datePublished":"2026-08-10T12:03:54.666Z","dateReserved":"2026-07-30T09:28:09.386Z","dateUpdated":"2026-08-10T12:03:54.666Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:30","lastModifiedDate":"2026-08-10 13:20:30","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68376","Ordinal":"1","Title":"sctp: fix auth_hmacs array size in struct sctp_cookie","CVE":"CVE-2026-68376","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68376","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix auth_hmacs array size in struct sctp_cookie\n\nThe auth_hmacs array in struct sctp_cookie is supposed to store a complete\nSCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr\nfollowed by N HMAC identifiers.\n\nHowever, the array size was calculated using an extra 2 bytes instead of\nsizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers\nare configured, the HMAC-ALGO parameter stored in the endpoint is larger\nthan the auth_hmacs buffer in the cookie.\n\nAs a result, sctp_association_init() copies beyond the end of auth_hmacs\nwhen initializing the association, corrupting the adjacent auth_chunks\nfield. This can lead to an invalid HMAC identifier being accepted and later\ncause an out-of-bounds read in sctp_auth_get_hmac().\n\nFix the array size calculation by including the full SCTP parameter header\nsize.","Type":"Description","Title":"sctp: fix auth_hmacs array size in struct sctp_cookie"}]}}}