{"id":"CVE-2026-98301","revision":"790c18f9a8ce4c6ea684fc362277f3a3","records":[{"revision":"790c18f9a8ce4c6ea684fc362277f3a3","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98301","aliases":[],"title":"net: bridge: mst: move switchdev call outside rcu","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mst: move switchdev call outside rcu\n\nThis is a follow-up of one of sashiko's pre-existing bug reports.\nbr_mst_set_state() calls switchdev_port_attr_set() for nonzero MSTIs\nwhile holding rcu_read_lock() which invokes the blocking switchdev\nnotifier chain and may sleep. Nonzero MSTI changes come from netlink\nwith rtnl held. Move the switchdev call before entering the rcu section and\nassert that rtnl is held.\n\nThe call cannot be deferred because netlink needs its error and extack.\nAlso DSA reads the old bridge MST state during the callback and checks it.\nA deferred callback will be late and will see the updated state.","state":0,"publishedAt":"2026-10-06T08:45:58.908+00:00","modifiedAt":"2026-10-19T09:17:12.171+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_mst.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8ca9a750fc711911ef616ceb627d07357b04545e\",\n                            \"lessThan\": \"b9661fd2423fc25e91e0517ecc0b6156ad83e3a8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4488617e5e995a09abe4d81add5fb165674edb59\",\n                            \"lessThan\": \"6b431b63219853eef4054e2f1cb073d2ca2059b4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a7c1661ae1383364cd6092d851f5e5da64d476b\",\n                            \"lessThan\": \"abf734d150c61acfdfee102169d0e5d1c482e285\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a7c1661ae1383364cd6092d851f5e5da64d476b\",\n                            \"lessThan\": \"d5c4ee1fa4e83a12afc051c831936cd8e006cde3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a7c1661ae1383364cd6092d851f5e5da64d476b\",\n                            \"lessThan\": \"c40ed3e884c8dc0350f26484030438ef24208ff1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3a7c1661ae1383364cd6092d851f5e5da64d476b\",\n                            \"lessThan\": \"18a6fe05fb6e18de29fa90d388bb34044114b3d8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"a2b01e65d9ba8af2bb086d3b7288ca53a07249ac\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e43dd2b1ec746e105b7db5f9ad6ef14685a615a4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.1.93\",\n                            \"lessThan\": \"6.1.189\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.33\",\n                            \"lessThan\": \"6.6.158\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.8.12\",\n                            \"lessThan\": \"6.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.9.3\",\n                            \"lessThan\": \"6.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\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_mst.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.10\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.10\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\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/b9661fd2423fc25e91e0517ecc0b6156ad83e3a8","https://git.kernel.org/stable/c/6b431b63219853eef4054e2f1cb073d2ca2059b4","https://git.kernel.org/stable/c/abf734d150c61acfdfee102169d0e5d1c482e285","https://git.kernel.org/stable/c/d5c4ee1fa4e83a12afc051c831936cd8e006cde3","https://git.kernel.org/stable/c/c40ed3e884c8dc0350f26484030438ef24208ff1","https://git.kernel.org/stable/c/18a6fe05fb6e18de29fa90d388bb34044114b3d8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98301","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98301","identifiers":["CVE-2026-98301"]},"retained":false,"historicalAffected":[]}],"coverage":[]}