PT-2026-43784 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-45917

NVD

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.

Related Identifiers

CVE-2026-45917

Affected Products

Linux

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-45917 · Security Note
• https://git.kernel.org/stable/c/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e · Note
• https://git.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55f · Note
• https://git.kernel.org/stable/c/bae53b3baf2ff2f45f9205c438818fc055601a54 · Note
• https://git.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896 · Note