{"id":"CVE-2026-99071","revision":"194a2268dcac470e8e25d3ec462f1d19","records":[{"revision":"194a2268dcac470e8e25d3ec462f1d19","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-99071","aliases":[],"title":"ipv4: do not warn on route notification size race","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: do not warn on route notification size race\n\nCommit 680aea08e78c (\"net: ipv4: Emit notification when fib hardware\nflags are changed\") added asynchronous route notifications for hardware\nflag changes.\n\nfib_alias_hw_flags_set() sizes the skb with fib_nlmsg_size() and later\nfills it with fib_dump_info() while holding only RCU.  With nexthop\ncompatibility mode enabled, a concurrent replacement can grow the group\nbetween these independent snapshots.  fib_dump_info() can then\nlegitimately return -EMSGSIZE, so the warning does not prove a sizing bug.\n\nRemove the warning.  The existing error path still frees the skb and\nreports the error to listeners.","state":0,"publishedAt":"2026-10-23T12:23:14.297+00:00","modifiedAt":"2026-10-23T12:23:14.297+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/ipv4/fib_trie.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"680aea08e78c003292415518ad270bc20f9c80b1\",\n                            \"lessThan\": \"088ba80eef85fa7a5ad8f9e7c82b403c99242b56\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"680aea08e78c003292415518ad270bc20f9c80b1\",\n                            \"lessThan\": \"78a1cf5c54b2f795c81fedb530755a8d01cc84f0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"680aea08e78c003292415518ad270bc20f9c80b1\",\n                            \"lessThan\": \"7dfa7ca97f3ac46353edd4cc44f7733758e4535b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"680aea08e78c003292415518ad270bc20f9c80b1\",\n                            \"lessThan\": \"221ef5e1e44a044790f0f54e6aa237883f475a4d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"680aea08e78c003292415518ad270bc20f9c80b1\",\n                            \"lessThan\": \"e02a5b6588161673ef75a4bc5cdfb62bd493374d\",\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/ipv4/fib_trie.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.12\",\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/088ba80eef85fa7a5ad8f9e7c82b403c99242b56","https://git.kernel.org/stable/c/78a1cf5c54b2f795c81fedb530755a8d01cc84f0","https://git.kernel.org/stable/c/7dfa7ca97f3ac46353edd4cc44f7733758e4535b","https://git.kernel.org/stable/c/221ef5e1e44a044790f0f54e6aa237883f475a4d","https://git.kernel.org/stable/c/e02a5b6588161673ef75a4bc5cdfb62bd493374d"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99071","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99071","identifiers":["CVE-2026-99071"]},"retained":false,"historicalAffected":[]}],"coverage":[]}