Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: hsr: free learned nodes on device setup failure hsr_dev_finalize() can fail after a lower-device RX handler has already been registered (slave A is added before the failable slave B and interlink adds). RX handlers run in softirq regardless of the master's state, so frames received in that window can learn dynamic nodes into node_db, and the error unwind never releases them. Free both owned dynamic databases in the unwind, mirroring hsr_dellink(). proxy_node_db is provably empty on every current error exit (only interlink RX feeds it, and the interlink add is the last failable step) and is freed for symmetry. The order is safe: hsr_del_port() unregisters each RX handler with synchronize_net() before hsr_del_nodes() runs, which removes remaining entries with list_del_rcu() and defers their release with call_rcu() for readers already under RCU.
References
- https://git.kernel.org/stable/c/0a340ffd96943a49a78e367efac9517ca767d99b
- https://git.kernel.org/stable/c/49b01f2939abc676a6f9a118f07a10110ee5f683
- https://git.kernel.org/stable/c/65702339b3e9fd792f65d4b740928798194d86ce
- https://git.kernel.org/stable/c/7f16289b91eb316f170a6bd22d32e6c632f6a5b6
- https://git.kernel.org/stable/c/e691eee886871b933d772ffc76d66c80b4c0a25e
- https://git.kernel.org/stable/c/f7289e3492f2694dccd3d79287e0e31879b58650
FAQ
What is CVE-2026-100071?
CVE-2026-100071 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: net: hsr: free learned nodes on device setup failure hsr_dev_finalize() can fail after a lower-device RX handler has already been ...
How severe is CVE-2026-100071?
CVSS scoring is not yet available for CVE-2026-100071. Check NVD for updates.
Is there a patch for CVE-2026-100071?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.