CVE-2026-45917
In the Linux kernel, the following vulnerability has been resolved: ipvs: do not keep dest_dst if dev is going down There is race between the netdev notifier ip_vs_dst_event() and the code that caches dst with dev that is going down. As the FIB can be notified for the closed device after our handler finishes, it is possible valid route to be returned and cached resuling in a leaked dev reference until the dest is not removed. To prevent new dest_dst to be attached to dest just after the handler dropped the old one, add a netif_running() check to make sure the notifier handler is not currently running for device that is closing.
Affected versions
Linux kernel versions
2.6.39
and later are affected. Fixed in
6.12.75,
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45917 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e
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PatchKernel patch commithttps://git.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55f
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PatchKernel patch commithttps://git.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896
Frequently asked questions
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What is CVE-2026-45917?
CVE-2026-45917 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.39 onward and has been patched in 6.12.75, 6.18.14, 6.19.4 and others. CVE-2026-45917 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-45917?
Yes — CVE-2026-45917 has been patched. Fixed versions include 6.12.75, 6.18.14, 6.19.4 and others. If you are running Linux kernel 2.6.39 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45917 actively exploited?
No — CVE-2026-45917 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.