CVE-2026-45917 ipvs: do not keep dest_dst if dev is going down

What is CVE-2026-45917?

CVE-2026-45917 is a medium-severity vulnerability in Linux kernel, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Which versions are affected by CVE-2026-45917?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-45917?

Apply the vendor's patch.

Is CVE-2026-45917 being exploited?

There is no known exploitation of CVE-2026-45917 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-88641, BELL-CVE-2026-45917, DEBIAN-CVE-2026-45917, GHSA-rhv7-mr5p-cgr8, ROOT-OS-DEBIAN-11-CVE-2026-45917, ROOT-OS-DEBIAN-12-CVE-2026-45917 and 3 more.