{"id":"CVE-2026-100071","summary":"net: hsr: free learned nodes on device setup failure","details":"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.","modified":"2026-09-27T03:47:23.738364191Z","published":"2026-09-25T13:06:44.956Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100071.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a340ffd96943a49a78e367efac9517ca767d99b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/49b01f2939abc676a6f9a118f07a10110ee5f683"},{"type":"WEB","url":"https://git.kernel.org/stable/c/65702339b3e9fd792f65d4b740928798194d86ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7f16289b91eb316f170a6bd22d32e6c632f6a5b6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e691eee886871b933d772ffc76d66c80b4c0a25e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f7289e3492f2694dccd3d79287e0e31879b58650"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100071.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100071"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8"},{"fixed":"e691eee886871b933d772ffc76d66c80b4c0a25e"},{"fixed":"0a340ffd96943a49a78e367efac9517ca767d99b"},{"fixed":"f7289e3492f2694dccd3d79287e0e31879b58650"},{"fixed":"65702339b3e9fd792f65d4b740928798194d86ce"},{"fixed":"49b01f2939abc676a6f9a118f07a10110ee5f683"},{"fixed":"7f16289b91eb316f170a6bd22d32e6c632f6a5b6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100071.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.17.0"},{"fixed":"6.1.188"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.157"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100071.json"}}],"schema_version":"1.9.0"}