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CVE-2026-45849

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: mscc: ocelot: add missing lock protection in ocelot_port_xmit_inj() ocelot_port_xmit_inj() calls ocelot_can_inject() and o…

Published May 27, 2026linuxCWE-667EPSS 0.14%

Overview

CVE-2026-45849 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 27, 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:

net: mscc: ocelot: add missing lock protection in ocelot_port_xmit_inj()

ocelot_port_xmit_inj() calls ocelot_can_inject() and

ocelot_port_inject_frame() without holding the injection group lock.

Both functions contain lockdep_assert_held() for the injection lock,

and the correct caller felix_port_deferred_xmit() properly acquires

the lock using ocelot_lock_inj_grp() before calling these functions.

Add ocelot_lock_inj_grp()/ocelot_unlock_inj_grp() around the register

injection path to fix the missing lock protection. The FDMA path is not

affected as it uses its own locking mechanism.

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>= 6.1.107, < 6.1.165Affected

References

Refgit.kernel.org/stable/c/026f6513c5880c2c89e38ad66bbec2868f978605Refgit.kernel.org/stable/c/0b217a40156f497e09dd20d3f7baec40c785f386Refgit.kernel.org/stable/c/51c32ae7fae14552d79f7139614b77c1bbd57a48Refgit.kernel.org/stable/c/63da961381e0d979459dede713001f8452364477Refgit.kernel.org/stable/c/7ac58d8832802ec89baa7539e13e6d58a88cce04Refgit.kernel.org/stable/c/cc1b179f778f98270bdbbb48d183b4b6427ae198

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45849?

CVE-2026-45849 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 27, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-45849?

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-2026-45849?

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-2026-45849?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45849 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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