{"cve":"CVE-2026-97615","nvd":{"published":"2026-09-25T11:17:15.670","modified":"2026-10-21T13:21:14.970","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: use option bits for CFM/MRP frame handlers\n\nCFM and MRP register a global br_frame_type whose hlist_node is linked\ninto the per-bridge frame_type_list when the first MEP/MRP instance is\ncreated. Enabling the protocol on multiple bridges therefore inserts the\nsame node into multiple lists. Unregistering it on one bridge then\ncorrupts list state belonging to another.\n\nThese handlers can only be installed once per bridge, and they are\nuncommon. Track their per-bridge enable state with net_bridge option\nbits, which already live on the Rx hot cache line, and dispatch the\nmatching handler directly from the receive path. Check both bits\ntogether first as an unlikely case.\n\nRemove the generic frame_type_list and br_frame_type helpers, which\nhave had no other users since CFM and MRP were added. That shrinks\nstruct net_bridge by 8 bytes and drops the list walk from the fast\npath. When neither protocol is compiled in, BR_CFM_MRP_OPTS is 0 and\nthe compiler prunes the branch.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/260f99b355a44f6ce67971ebc9223b22c8f93957","https://git.kernel.org/stable/c/42e033c8f30fd2923ccac3373ae70797e521dae1","https://git.kernel.org/stable/c/7a49e6b16f36b8e085521699adbca3e321b6dd0c","https://git.kernel.org/stable/c/994fd705ca498223d188024cde833739a9dddbd2","https://git.kernel.org/stable/c/be5ead6552418d70df3a76b962ccd6ed78a31fb5"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-97615","score":0.00206,"percentile":0.10562,"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."]}