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CVE-2026-45959

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree Annotating a local pointer variable, which will be assigned w…

Published May 27, 2026CWE-476EPSS 0.13%

Overview

CVE-2026-45959 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

crypto: ccp - Fix a crash due to incorrect cleanup usage of kfree

Annotating a local pointer variable, which will be assigned with the

kmalloc-family functions, with the `__cleanup(kfree)` attribute will

make the address of the local variable, rather than the address returned

by kmalloc, passed to kfree directly and lead to a crash due to invalid

deallocation of stack address. According to other places in the repo,

the correct usage should be `__free(kfree)`. The code coincidentally

compiled because the parameter type `void *` of kfree is compatible with

the desired type `struct { ... } **`.

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/90f9090e3e744a8fe3bb6fa0e61f577347728b0bRefgit.kernel.org/stable/c/9a3ace9b010ffd8c422c97844ae152f7c53d6b18Refgit.kernel.org/stable/c/d5abcc33ee76bc26d58b39dc1a097e43a99dd438

How CyberStrike helps

Frequently asked questions

What is CVE-2026-45959?

CVE-2026-45959 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-45959?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-45959?

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-2026-45959?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-45959 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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