net: hsr: free learned nodes on device setup failure
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.
CVE-2026-100071
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-100071
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8",
"lessThan": "e691eee886871b933d772ffc76d66c80b4c0a25e",
"versionType": "git"
},
{
"status": "affected",
"version": "81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8",
"lessThan": "0a340ffd96943a49a78e367efac9517ca767d99b",
"versionType": "git"
},
{
"status": "affected",
"version": "81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8",
"lessThan": "f7289e3492f2694dccd3d79287e0e31879b58650",
"versionType": "git"
},
{
"status": "affected",
"version": "81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8",
"lessThan": "65702339b3e9fd792f65d4b740928798194d86ce",
"versionType": "git"
},
{
"status": "affected",
"version": "81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8",
"lessThan": "49b01f2939abc676a6f9a118f07a10110ee5f683",
"versionType": "git"
},
{
"status": "affected",
"version": "81ba6afd6e6443d2bf4bf40f16df1f1f91c603f8",
"lessThan": "7f16289b91eb316f170a6bd22d32e6c632f6a5b6",
"versionType": "git"
}
],
"programFiles": [
"net/hsr/hsr_device.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/hsr/hsr_device.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-100071
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34773 · Revision 1
- Added to Heist Feed
- Publisher date