What is CVE-2026-46101?

CVE-2026-46101 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.6 onward and patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-46101 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-46101?

CVE-2026-46101 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-46101?

Yes, CVE-2026-46101 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-46101 actively exploited?

CVE-2026-46101 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-46101

In the Linux kernel, the following vulnerability has been resolved: netfilter: reject zero shift in nft_bitwise Reject zero shift operands for nft_bitwise left and right shift expressions during initialization. The carry propagation logic computes the carry from the adjacent 32-bit word using BITS_PER_TYPE(u32) - shift. A zero shift operand turns this into a 32-bit shift, which is undefined behaviour. Reject zero shift operands in the control plane, alongside the existing check for values greater than or equal to 32, so malformed rules never reach the packet path.

Package Linux Kernel

Published 2026-05-27

Last modified 2026-06-01

Patch available

Yes

Affected versions

Linux kernel versions 5.6 and later are affected. Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4, 7.1-rc2 and their respective stable series.

Affected from

≥ 5.6

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 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-rc2

References

The following references provide additional information about CVE-2026-46101 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/4fccea585631621c975883911a08d15b6671f7dc
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6f820139d16a4c9865a145d4a9cf9c92cc632c14
Patch
Kernel patch commit
https://git.kernel.org/stable/c/9ad26c272405f53834871cc2e46b9b5393a666c3
Patch

8 patch commits total View all on NVD

Frequently asked questions

What is CVE-2026-46101?

CVE-2026-46101 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.6 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-46101 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-46101?

Yes — CVE-2026-46101 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 5.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-46101 actively exploited?

No — CVE-2026-46101 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.