{"id":"CVE-2026-68315","revision":"27606c5352c1457e9522440d54809cb3","records":[{"revision":"27606c5352c1457e9522440d54809cb3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-68315","aliases":[],"title":"sctp: validate stream count in sctp_process_strreset_inreq()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: validate stream count in sctp_process_strreset_inreq()\n\nWhen processing a RESET_IN_REQUEST from a peer,\nsctp_process_strreset_inreq() derives the stream count from the\nparameter length but does not check whether the resulting\nRESET_OUT_REQUEST would exceed SCTP_MAX_CHUNK_LEN.\n\nThe OUT request header (sctp_strreset_outreq, 16 bytes) is 8 bytes\nlarger than the IN request header (sctp_strreset_inreq, 8 bytes).\nGenerally, the IP payload is bounded to 65535 bytes, so the stream\nlist cannot be large enough to trigger the overflow. However, on\ninterfaces with MTU > 65535 (e.g., loopback with IPv6 jumbograms), a\nstream list that fits within the incoming IN parameter can cause a\n__u16 overflow in sctp_make_strreset_req() when computing the OUT\nrequest size, leading to an undersized skb allocation and a kernel\nBUG:\n\n  net/core/skbuff.c:207         skb_panic\n  net/core/skbuff.c:2625        skb_put\n  net/sctp/sm_make_chunk.c:1535 sctp_addto_chunk\n  net/sctp/sm_make_chunk.c:3695 sctp_make_strreset_req\n  net/sctp/stream.c:655         sctp_process_strreset_inreq\n\nThe local setsockopt path validates the generated reset request size.\nHowever, for an incoming-only reset, it accounts for the smaller IN\nrequest even though the peer must generate an OUT request with the same\nstream list. Such a request cannot be completed successfully by the\npeer.\n\nReject peer IN requests whose corresponding OUT request would exceed\nSCTP_MAX_CHUNK_LEN. Also tighten the local check so it does not send an\nIN request that would require an oversized OUT request from the peer.","state":0,"publishedAt":"2026-08-10T12:02:50.156+00:00","modifiedAt":"2026-10-19T21:09:04.525+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/stream.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"61327d8e7cfb0259d527be17202630f556213249\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"7cf7439948e3bf639119119922c88ec190874ca3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"60c47dea5d320d2fc706e9aad1db38a04df0a056\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"b255d8cd6cc68045ae9eecbac3b3c14e1f176c9b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"6f0e39d180cd7cced647381b6fa14fd83d261047\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"1a10fe1aa9c01f41b389a31906a77d538637c9d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"00ae679cb21a035491fdad8d58dc6d79cc68b675\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137\",\n                            \"lessThan\": \"18ae07691d43183d270de8be9dc8e027906015d9\",\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/stream.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.11\",\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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/61327d8e7cfb0259d527be17202630f556213249","https://git.kernel.org/stable/c/7cf7439948e3bf639119119922c88ec190874ca3","https://git.kernel.org/stable/c/60c47dea5d320d2fc706e9aad1db38a04df0a056","https://git.kernel.org/stable/c/b255d8cd6cc68045ae9eecbac3b3c14e1f176c9b","https://git.kernel.org/stable/c/6f0e39d180cd7cced647381b6fa14fd83d261047","https://git.kernel.org/stable/c/1a10fe1aa9c01f41b389a31906a77d538637c9d9","https://git.kernel.org/stable/c/00ae679cb21a035491fdad8d58dc6d79cc68b675","https://git.kernel.org/stable/c/18ae07691d43183d270de8be9dc8e027906015d9"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-68315","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-68315","identifiers":["CVE-2026-68315"]},"retained":false,"historicalAffected":[]}],"coverage":[]}