What is CVE-2026-45917?

CVE-2026-45917 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 2.6.39 onward and 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.

What is the CVSS score for CVE-2026-45917?

CVE-2026-45917 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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.

Is CVE-2026-45917 actively exploited?

CVE-2026-45917 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-45917

Medium

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.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-06-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Affected from

≥ 2.6.39

Fixed in

✓ 6.12.75 6.12.x ✓ 6.18.14 6.18.x ✓ 6.19.4 6.19.x ✓ 7.0

References

4 total

Kernel Git
https://git.kernel.org/stable/c/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e

Patch
Kernel Git
https://git.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55f

Patch
Kernel Git
https://git.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896

Patch
Kernel Git
https://git.kernel.org/stable/c/bae53b3baf2ff2f45f9205c438818fc055601a54

Patch

Details

CVE ID CVE-2026-45917

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-27

Modified 2026-06-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-45917?

CVE-2026-45917 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . 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.
What is the CVSS score for CVE-2026-45917?

CVE-2026-45917 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
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.
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.