{"id":"CVE-2026-99073","revision":"7acad387e03c4f97ade9abc8827dde26","records":[{"revision":"7acad387e03c4f97ade9abc8827dde26","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-99073","aliases":[],"title":"ipv4: stop exception dump when nexthop group shrinks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: stop exception dump when nexthop group shrinks\n\nCommit 4ce5dc9316de (\"inet: switch inet_dump_fib() to RCU\nprotection\") allowed IPv4 FIB dumps to run concurrently with nexthop\nreplacement.\n\nfib_dump_info_fnhe() uses fib_info_num_path() as the loop bound,\nthen fib_info_nhc() independently reloads nh->nh_grp. If\nRTM_NEWNEXTHOP replaces a group with fewer paths between those loads,\nfib_info_nhc() returns NULL and the dump dereferences it through\nnhc_flags.\n\nStop the walk when the indexed path is absent. Nexthop groups are\ndense, so the current snapshot has no later path.","state":0,"publishedAt":"2026-10-23T12:23:16.935+00:00","modifiedAt":"2026-10-23T12:23:16.935+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/route.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4ce5dc9316de50e0da84beafe55d1344f829cece\",\n                            \"lessThan\": \"f91e472821e32f58b03eb631e20a67157e2b928b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4ce5dc9316de50e0da84beafe55d1344f829cece\",\n                            \"lessThan\": \"21cba134c30c17ae55f468b5809336437df5d7e6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4ce5dc9316de50e0da84beafe55d1344f829cece\",\n                            \"lessThan\": \"b9a30bb7b831e8c5a47fadbdf1760918aaf009cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"4ce5dc9316de50e0da84beafe55d1344f829cece\",\n                            \"lessThan\": \"4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2\",\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/route.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.9\",\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/f91e472821e32f58b03eb631e20a67157e2b928b","https://git.kernel.org/stable/c/21cba134c30c17ae55f468b5809336437df5d7e6","https://git.kernel.org/stable/c/b9a30bb7b831e8c5a47fadbdf1760918aaf009cc","https://git.kernel.org/stable/c/4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99073","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99073","identifiers":["CVE-2026-99073"]},"retained":false,"historicalAffected":[]}],"coverage":[]}