CVE-2026-97419: Linux kernel · hsr: broadcast netlink notifications in the device's net namespace
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the Linux kernel to switch the multicast calls to genlmsg_multicast_netns(), ensuring that netlink notifications are delivered within the correct network namespace. Users should apply the updated kernel versions containing this fix. Patch status is not explicitly confirmed in the input data; therefore, check the vendor advisory for current remediation guidance.
Description
A vulnerability in the Linux kernel's HSR generic netlink family was resolved. The issue involved broadcast netlink notifications being sent only to the default network namespace (init_net), causing listeners in other namespaces not to receive their own device events and privileged listeners in init_net to receive events from other namespaces. This behavior was due to the use of genlmsg_multicast() instead of genlmsg_multicast_netns(), which was corrected.
References
- ubuntu.com/security/CVE-2026-97419 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97419 (opens in a new tab)
- git.kernel.org/stable/c/25b69f281cebe051a8e4ab19950a939c27ead1bc (opens in a new tab)
- git.kernel.org/stable/c/a762fabd7ef9a6cc07258684138f9c3f078d0326 (opens in a new tab)
- git.kernel.org/stable/c/24b3f1a9982c176d05a523a4bb9314dca0db4488 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97419 (opens in a new tab)
- git.kernel.org/stable/c/016b8eaca53bfd57e84ea28b5c9174c89d7679e1 (opens in a new tab)
- git.kernel.org/stable/c/798ccb12810a58a37264685b28ddf990ef49559c (opens in a new tab)
- git.kernel.org/stable/c/9bf45feee630be868ab54e3d0f3d430c07471f0e (opens in a new tab)
- git.kernel.org/stable/c/9f13023607f1e95bd098cc49052b0c8955d334f9 (opens in a new tab)