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CVE-2026-46249

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix PF driver crash with kexec kernel booting During a kexec reboot the hardware is not power-cycled, so AF state…

Published Jun 3, 2026linuxEPSS 0.11%

Overview

CVE-2026-46249 is a medium-severity vulnerability affecting linux linux_kernel. It was published on June 3, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

octeontx2-af: Fix PF driver crash with kexec kernel booting

During a kexec reboot the hardware is not power-cycled, so AF state from

the old kernel can persist into the new kernel. When AF and PF drivers

are built as modules, the PF driver may probe before AF reinitializes

the hardware.

The PF driver treats the RVUM block revision as an indication that AF

initialization is complete. If this value is left uncleared at shutdown,

PF may incorrectly assume AF is ready and access stale hardware state,

leading to a crash.

Clear the RVUM block revision during AF shutdown to avoid PF

mis-detecting AF readiness after kexec.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 4.20, < 5.10.252Affected

References

Refgit.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79Refgit.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94Refgit.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558cRefgit.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585Refgit.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9Refgit.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2Refgit.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61aRefgit.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46249?

CVE-2026-46249 is a medium-severity vulnerability affecting linux linux_kernel. It was published on June 3, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-46249?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-46249?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-46249?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46249 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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