{"cve":"CVE-2026-80586","nvd":{"published":"2026-08-26T15:17:14.873","modified":"2026-10-16T20:18:01.740","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: options: reset DSS fields in case of unexpected size\n\nA remote peer could send a malformed DSS with a wrong size, followed by\nanother DSS or MPC + Data. In this case, the first suboption will be\nignored, but leaving some fields written, which could lead to\ninconsistency or access uninitialized data.\n\nExplicitly reset the fields that could have been modified in case of\nunexpected size.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":[],"references":["https://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b","https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596","https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36","https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b","https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-80586","score":0.00399,"percentile":0.33854,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}