Answer in brief
CVE-2026-68376 records a High severity (CVSS 8.1) vulnerability in sctp: fix auth_hmacs array size in struct sctp_cookie. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1f485649f52929d9937b346a920a522a7363e202 <0b4414e43e0861d67276031cc21401d7e87de3da || >=1f485649f52929d9937b346a920a522a7363e202 <d0a59ba58578e2b330fff80a44fe519f3ba7d8c7 || >=1f485649f52929d9937b346a920a522a7363e202 <a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db || >=1f485649f52929d9937b346a920a522a7363e202 <3aa40c3bccac2312ea7cf97f329190637f972b5d || >=1f485649f52929d9937b346a920a522a7363e202 <e0b5252a59383b77d1b8dbeda00b7184dd95f4d3 | 0b4414e43e0861d67276031cc21401d7e87de3da, d0a59ba58578e2b330fff80a44fe519f3ba7d8c7, a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db, 3aa40c3bccac2312ea7cf97f329190637f972b5d, e0b5252a59383b77d1b8dbeda00b7184dd95f4d3 |
| Linux/Linuxgeneric | 2.6.24 | Not reported |
| Linux/Linuxgeneric | >=1f485649f52929d9937b346a920a522a7363e202 <317731d01b03c529809df36d3a7d149677a8729d || >=1f485649f52929d9937b346a920a522a7363e202 <0528485f27016a42804abe01aa61b39d85fa803e || >=1f485649f52929d9937b346a920a522a7363e202 <ee5e65964f456adfe14d526fba0bd055de98ecf3 || >=1f485649f52929d9937b346a920a522a7363e202 <0b4414e43e0861d67276031cc21401d7e87de3da || >=1f485649f52929d9937b346a920a522a7363e202 <d0a59ba58578e2b330fff80a44fe519f3ba7d8c7 || >=1f485649f52929d9937b346a920a522a7363e202 <a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db || >=1f485649f52929d9937b346a920a522a7363e202 <3aa40c3bccac2312ea7cf97f329190637f972b5d || >=1f485649f52929d9937b346a920a522a7363e202 <e0b5252a59383b77d1b8dbeda00b7184dd95f4d3 | 317731d01b03c529809df36d3a7d149677a8729d, 0528485f27016a42804abe01aa61b39d85fa803e, ee5e65964f456adfe14d526fba0bd055de98ecf3, 0b4414e43e0861d67276031cc21401d7e87de3da, d0a59ba58578e2b330fff80a44fe519f3ba7d8c7, a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db, 3aa40c3bccac2312ea7cf97f329190637f972b5d, e0b5252a59383b77d1b8dbeda00b7184dd95f4d3 |
Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 10, 2026
In the Linux kernel, the following vulnerability has been resolved: sctp: fix auth_hmacs array size in struct sctp_cookie The auth_hmacs array in struct sctp_cookie is supposed to store a complete SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr followed by N HMAC identifiers. However, the array size was calculated using an extra 2 bytes instead of sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers are configured, the HMAC-ALGO parameter stored in the endpoint is larger than the auth_hmacs buffer in the cookie. As a result, sctp_association_init() copies beyond the end of auth_hmacs when initializing the association, corrupting the adjacent auth_chunks field. This can lead to an invalid HMAC identifier being accepted and later cause an out-of-bounds read in sctp_auth_get_hmac(). Fix the array size calculation by including the full SCTP parameter header size.
Quoted source text, attributed separately from HOL analysis.