{"cve":"CVE-2026-43383","nvd":{"published":"2026-05-08T15:16:49.593","modified":"2026-10-19T20:18:15.907","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tcp-md5: Fix MAC comparison to be constant-time\n\nTo prevent timing attacks, MACs need to be compared in constant\ntime.  Use the appropriate helper function for this.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","score":9.4},"cwes":["CWE-208"],"references":["https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6","https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3dd","https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3","https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cb","https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbc"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-43383","score":0.00541,"percentile":0.45235,"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."]}