{"id":"CVE-2026-68320","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-68320","summary":"sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid","details":"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.","published":"2026-08-10T12:02:55.144Z","modified":"2026-08-14T04:04:00.429101883Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.148"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/11092d79eb2b7c0068382f72fc2416d1786bb2e0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a365f1e423444c5da7eb689a8661633dad43e48"},{"type":"WEB","url":"https://git.kernel.org/stable/c/886e28e14ab655012779016d251fef53d103aa12"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b6ea3dda09eb4d5caf7bbc00f857688cf9e98255"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ff04b26794a16a8a879eb4fd2c02c2d6b03850e9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68320.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68320"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-14T04:04:00.429101883Z"}}