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CVE-2024-56706

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex Reservation of the PMU hardware is done at first event creat…

Published Dec 28, 2024CWE-125EPSS 0.17%

Overview

CVE-2024-56706 is a high-severity vulnerability. It was published on December 28, 2024 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:

s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex

Reservation of the PMU hardware is done at first event creation

and is protected by a pair of mutex_lock() and mutex_unlock().

After reservation of the PMU hardware the memory

required for the PMUs the event is to be installed on is

allocated by allocate_buffers() and alloc_sampling_buffer().

This done outside of the mutex protection.

Without mutex protection two or more concurrent invocations of

perf_event_init() may run in parallel.

This can lead to allocation of Sample Data Blocks (SDBs)

multiple times for the same PMU.

Prevent this and protect memory allocation of SDBs by

mutex.

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/4b3bdfa89635db6a53e02955548bd07bebcae233Refgit.kernel.org/stable/c/f55bd479d8663a4a4e403b3d308d3d1aa33d92df

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56706?

CVE-2024-56706 is a high-severity vulnerability. It was published on December 28, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-56706?

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-2024-56706?

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-2024-56706?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56706 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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