{"id":"CVE-2026-99073","published":"2026-10-23T13:17:31.260","lastModified":"2026-10-23T13:17:31.260","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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/21cba134c30c17ae55f468b5809336437df5d7e6","tags":[]},{"url":"https://git.kernel.org/stable/c/4f4afc07dcb2edd4f9afa36595373f8cdb9b58c2","tags":[]},{"url":"https://git.kernel.org/stable/c/b9a30bb7b831e8c5a47fadbdf1760918aaf009cc","tags":[]},{"url":"https://git.kernel.org/stable/c/f91e472821e32f58b03eb631e20a67157e2b928b","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}