Answer in brief
CVE-2026-100071 records a Unknown severity vulnerability in net: hsr: free learned nodes on device setup failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 <e691eee886871b933d772ffc76d66c80b4c0a25e || >=81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 <0a340ffd96943a49a78e367efac9517ca767d99b || >=81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 <f7289e3492f2694dccd3d79287e0e31879b58650 || >=81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 <65702339b3e9fd792f65d4b740928798194d86ce || >=81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 <49b01f2939abc676a6f9a118f07a10110ee5f683 || >=81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 <7f16289b91eb316f170a6bd22d32e6c632f6a5b6 | e691eee886871b933d772ffc76d66c80b4c0a25e, 0a340ffd96943a49a78e367efac9517ca767d99b, f7289e3492f2694dccd3d79287e0e31879b58650, 65702339b3e9fd792f65d4b740928798194d86ce, 49b01f2939abc676a6f9a118f07a10110ee5f683, 7f16289b91eb316f170a6bd22d32e6c632f6a5b6 |
| Linux/Linuxgeneric | 3.17 | Not reported |
Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 25, 2026
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.
Quoted source text, attributed separately from HOL analysis.