{"id":"CVE-2026-100071","published":"2026-09-25T14:17:13.567","lastModified":"2026-09-25T14:17:13.567","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: free learned nodes on device setup failure\n\nhsr_dev_finalize() can fail after a lower-device RX handler has\nalready been registered (slave A is added before the failable slave B\nand interlink adds). RX handlers run in softirq regardless of the\nmaster's state, so frames received in that window can learn dynamic\nnodes into node_db, and the error unwind never releases them.\n\nFree both owned dynamic databases in the unwind, mirroring\nhsr_dellink(). proxy_node_db is provably empty on every current error\nexit (only interlink RX feeds it, and the interlink add is the last\nfailable step) and is freed for symmetry. The order is safe:\nhsr_del_port() unregisters each RX handler with synchronize_net()\nbefore hsr_del_nodes() runs, which removes remaining entries with\nlist_del_rcu() and defers their release with call_rcu() for readers\nalready under RCU.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/0a340ffd96943a49a78e367efac9517ca767d99b","tags":[]},{"url":"https://git.kernel.org/stable/c/49b01f2939abc676a6f9a118f07a10110ee5f683","tags":[]},{"url":"https://git.kernel.org/stable/c/65702339b3e9fd792f65d4b740928798194d86ce","tags":[]},{"url":"https://git.kernel.org/stable/c/7f16289b91eb316f170a6bd22d32e6c632f6a5b6","tags":[]},{"url":"https://git.kernel.org/stable/c/e691eee886871b933d772ffc76d66c80b4c0a25e","tags":[]},{"url":"https://git.kernel.org/stable/c/f7289e3492f2694dccd3d79287e0e31879b58650","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}