{"id":"CVE-2026-99031","revision":"90d65553666c422cb22855fc91f0ae04","records":[{"revision":"90d65553666c422cb22855fc91f0ae04","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-99031","aliases":[],"title":"net: bridge: avoid recursive multicast port cleanup","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.","state":0,"publishedAt":"2026-10-23T12:21:31.535+00:00","modifiedAt":"2026-10-23T12:21:31.535+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bridge/br_multicast.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8266a0491e92d39dc9af739e8380a0daa9b8836b\",\n                            \"lessThan\": \"695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8266a0491e92d39dc9af739e8380a0daa9b8836b\",\n                            \"lessThan\": \"2fb87c6025f90191516bee3ce14b42eb3e1cfed7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8266a0491e92d39dc9af739e8380a0daa9b8836b\",\n                            \"lessThan\": \"d109141ba14652146089ef78b32d5e4d5285ebad\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8266a0491e92d39dc9af739e8380a0daa9b8836b\",\n                            \"lessThan\": \"7931fb9181421953f3133b408b0f2e2b8dd68b61\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8266a0491e92d39dc9af739e8380a0daa9b8836b\",\n                            \"lessThan\": \"5158353121bae4f552cb677ce8c5c3ef52f93a0d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/bridge/br_multicast.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.160\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/695a5a4c69c922d9296b2d7ad5f1ce8c6858fc64","https://git.kernel.org/stable/c/2fb87c6025f90191516bee3ce14b42eb3e1cfed7","https://git.kernel.org/stable/c/d109141ba14652146089ef78b32d5e4d5285ebad","https://git.kernel.org/stable/c/7931fb9181421953f3133b408b0f2e2b8dd68b61","https://git.kernel.org/stable/c/5158353121bae4f552cb677ce8c5c3ef52f93a0d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99031","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99031","identifiers":["CVE-2026-99031"]},"retained":false,"historicalAffected":[]}],"coverage":[]}