{"cve":"CVE-2026-72348","nvd":{"published":"2026-08-15T06:22:08.177","modified":"2026-10-16T19:17:24.723","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6tables: mark malformed IPv6 extension headers for hotdrop\n\nThe ah, hbh and rt matches check that the fixed extension header is\npresent, then use the header length field to derive the advertised\nextension header length for matching.\n\nFor the ah match, add the missing advertised-length check. For hbh\nand rt, update the existing advertised-length checks. In all three\ncases, set hotdrop to true before returning false when the advertised\nextension header length exceeds the available skb data.\n\nReturning false treats the packet as a rule mismatch. Set hotdrop to\ntrue and drop malformed packets so they cannot bypass rules intended\nto drop packets with these IPv6 extension headers.","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:N","score":9.1},"cwes":[],"references":["https://git.kernel.org/stable/c/2fd89a50a9783eed8ed23866b11c8b3d8779a7a8","https://git.kernel.org/stable/c/3578b6d92a5b1e603ae6e8c8f5538a709f03aba4","https://git.kernel.org/stable/c/3d441be2b1c5e98167302fa1c7b61960a067b112","https://git.kernel.org/stable/c/43ccc20b5a733226417832cf16ef45322e594990","https://git.kernel.org/stable/c/d5e39e5eb6b30bc4a3bb7aba54c293cf36a806c7"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-72348","score":0.00626,"percentile":0.49696,"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."]}