What is CVE-2026-46026?

CVE-2026-46026 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.7 onward and patched in 6.6.140, 6.12.86, 6.18.27 and others. CVE-2026-46026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46026?

CVE-2026-46026 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-46026?

Yes, CVE-2026-46026 has been patched. Fixed versions include 6.6.140, 6.12.86, 6.18.27 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46026 actively exploited?

CVE-2026-46026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46026

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Limit the maximum number of lookups Current code does no bound checking on the number of lookups a client can perform. Though the code restricts the lookups to local clients, there is still a possibility of a malicious local client sending a flood of NEW_LOOKUP messages over the same socket. Fix this issue by limiting the maximum number of lookups to 64 globally. Since the nameserver allows only atmost one local observer, this global lookup count will ensure that the lookups stay within the limit. Note that, limit of 64 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-05-27

Patch available

Yes

Affected versions

Linux kernel versions 5.7 and later are affected. Fixed in 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1-rc1 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 6.6.140 6.6.x ✓ 6.12.86 6.12.x ✓ 6.18.27 6.18.x ✓ 7.0.4 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-46026 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0dbec101a7076e9b1e4bd1876f7cf07c56ff4ce3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/20855cef7e659ef84ac73251256fa530819b2346
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2b930bc77e00cb27e1d6e1d497b3b596283465ef
Patch

5 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-46026?

CVE-2026-46026 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.7 onward and has been patched in 6.6.140, 6.12.86, 6.18.27 and others. CVE-2026-46026 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-46026?

Yes — CVE-2026-46026 has been patched. Fixed versions include 6.6.140, 6.12.86, 6.18.27 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46026 actively exploited?

No — CVE-2026-46026 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.