hsr: broadcast netlink notifications in the device's net namespace

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97419
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-24 17:17:19 UTC
Updated2026-10-03 11:17:54 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hsr: broadcast netlink notifications in the device's net namespace The HSR generic netlink family sets .netnsok = true. HSR devices can live in network namespaces other than init_net. Two async notifiers broadcast events with genlmsg_multicast(). They are hsr_nl_ringerror() and hsr_nl_nodedown(). That helper delivers only on the default genl socket in init_net. So the events always land in init_net. The network namespace of the device does not matter. This has two effects. A listener in the device's own namespace never sees its own ring error and node down events. A privileged listener in init_net receives events from HSR devices in other namespaces. The payload carries the peer node MAC (HSR_A_NODE_ADDR) and the slave port ifindex (HSR_A_IFINDEX). Switch both callers to genlmsg_multicast_netns(). Other families with .netnsok = true already do this. Examples are gtp, ovpn, team, batman-adv, netdev-genl, ethtool and handshake. hsr_nl_ringerror() already has the slave port. It uses dev_net(port->dev). hsr_nl_nodedown() takes the namespace from the master port via hsr_port_get_hsr().

Risk And Classification

EPSS: 0.001730000 probability, percentile 0.060300000 (date 2026-10-05)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d 9f13023607f1e95bd098cc49052b0c8955d334f9 git Not specified
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d 798ccb12810a58a37264685b28ddf990ef49559c git Not specified
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d 9bf45feee630be868ab54e3d0f3d430c07471f0e git Not specified
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d 016b8eaca53bfd57e84ea28b5c9174c89d7679e1 git Not specified
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d 25b69f281cebe051a8e4ab19950a939c27ead1bc git Not specified
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d 24b3f1a9982c176d05a523a4bb9314dca0db4488 git Not specified
CNA Linux Linux affected f421436a591d34fa5279b54a96ac07d70250cc8d a762fabd7ef9a6cc07258684138f9c3f078d0326 git Not specified
CNA Linux Linux affected 3.13 Not specified
CNA Linux Linux unaffected 3.13 semver Not specified
CNA Linux Linux unaffected 5.10.271 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.222 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.189 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.158 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/016b8eaca53bfd57e84ea28b5c9174c89d7679e1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a762fabd7ef9a6cc07258684138f9c3f078d0326 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/24b3f1a9982c176d05a523a4bb9314dca0db4488 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9bf45feee630be868ab54e3d0f3d430c07471f0e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/25b69f281cebe051a8e4ab19950a939c27ead1bc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f13023607f1e95bd098cc49052b0c8955d334f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/798ccb12810a58a37264685b28ddf990ef49559c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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