{"id":"CVE-2026-99031","published":"2026-10-23T13:17:26.190","lastModified":"2026-10-23T13:17:26.190","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: avoid recursive multicast port cleanup\n\nbr_multicast_sg_del_exclude_ports() removes automatically added STAR_EXCL\nport groups by calling br_multicast_del_pg(). For S,G entries, that\ndeletion calls back into br_multicast_sg_del_exclude_ports(), so a large\nnumber of STAR_EXCL ports consumes one kernel stack frame per port and can\nhit the stack guard page.\n\nKeep the complete port-group deletion path for cleanup, but suppress the\nS,G exclude-port cleanup while that helper is already walking the same\nentry. Normal deletion callers retain the existing behavior.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/2fb87c6025f90191516bee3ce14b42eb3e1cfed7","tags":[]},{"url":"https://git.kernel.org/stable/c/5158353121bae4f552cb677ce8c5c3ef52f93a0d","tags":[]},{"url":"https://git.kernel.org/stable/c/695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64","tags":[]},{"url":"https://git.kernel.org/stable/c/7931fb9181421953f3133b408b0f2e2b8dd68b61","tags":[]},{"url":"https://git.kernel.org/stable/c/d109141ba14652146089ef78b32d5e4d5285ebad","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}