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CVE-2026-46024

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply() If a message of type CEPH_MSG_AUTH_REPLY contains a zero…

Published May 27, 2026CWE-476EPSS 0.70%

Overview

CVE-2026-46024 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

libceph: Prevent potential null-ptr-deref in ceph_handle_auth_reply()

If a message of type CEPH_MSG_AUTH_REPLY contains a zero value for both

protocol and result, this is currently not treated as an error. In case

of ac->negotiating == true and ac->protocol > 0, this leads to setting

ac->protocol = 0 and ac->ops = NULL. Thereafter, the check for

ac->protocol != protocol returns false, and init_protocol() is not

called. Subsequently, ac->ops->handle_reply() is called, which leads to

a null pointer dereference, because ac->ops is still NULL.

This patch changes the check for ac->protocol != protocol to

!ac->protocol, as this also includes the case when the protocol was set

to zero in the message. This causes the message to be treated as

containing a bad auth protocol.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refgit.kernel.org/stable/c/016bc663657366d386993f63eb31072eb45a2b77Refgit.kernel.org/stable/c/4b2738b93edad661178340239de657d876b73d3dRefgit.kernel.org/stable/c/5199c125d25aeae8615c4fc31652cc0fe624338eRefgit.kernel.org/stable/c/8f2be7285941a33a9f72579a23b96392f83c758eRefgit.kernel.org/stable/c/927e4bd5692f2a4901808822981fb2c8d4456548Refgit.kernel.org/stable/c/9ded62c302c0342efdb5eda3bf6e75720caad0dfRefgit.kernel.org/stable/c/f101271fcf55d7eacfefd610b51ec65f46ba8118

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46024?

CVE-2026-46024 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-46024?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-46024?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2026-46024?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46024 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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