net: hsr: free learned nodes on device setup failure
Summary
| CVE | CVE-2026-100071 |
|---|
| State | PUBLISHED |
|---|
| Assigner | Linux |
|---|
| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-09-25 14:17:13 UTC |
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| Updated | 2026-09-25 14:17:13 UTC |
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| 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. |
|---|
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 e691eee886871b933d772ffc76d66c80b4c0a25e git |
Not specified |
| CNA |
Linux |
Linux |
affected 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 0a340ffd96943a49a78e367efac9517ca767d99b git |
Not specified |
| CNA |
Linux |
Linux |
affected 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 f7289e3492f2694dccd3d79287e0e31879b58650 git |
Not specified |
| CNA |
Linux |
Linux |
affected 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 65702339b3e9fd792f65d4b740928798194d86ce git |
Not specified |
| CNA |
Linux |
Linux |
affected 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 49b01f2939abc676a6f9a118f07a10110ee5f683 git |
Not specified |
| CNA |
Linux |
Linux |
affected 81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8 7f16289b91eb316f170a6bd22d32e6c632f6a5b6 git |
Not specified |
| CNA |
Linux |
Linux |
affected 3.17 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 3.17 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.1.188 6.1.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.157 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.110 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.52 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.2.6 7.2.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.3-rc1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/65702339b3e9fd792f65d4b740928798194d86ce |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/f7289e3492f2694dccd3d79287e0e31879b58650 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0a340ffd96943a49a78e367efac9517ca767d99b |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/7f16289b91eb316f170a6bd22d32e6c632f6a5b6 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/49b01f2939abc676a6f9a118f07a10110ee5f683 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/e691eee886871b933d772ffc76d66c80b4c0a25e |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.