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CVE-2024-44958

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: sched/smt: Fix unbalance sched_smt_present dec/inc I got the following warn report while doing stress test: jump label: negati…

Published Sep 4, 2024EPSS 0.21%

Overview

CVE-2024-44958 is a medium-severity vulnerability. It was published on September 4, 2024 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:

sched/smt: Fix unbalance sched_smt_present dec/inc

I got the following warn report while doing stress test:

jump label: negative count!

WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0

Call Trace:

<TASK>

__static_key_slow_dec_cpuslocked+0x16/0x70

sched_cpu_deactivate+0x26e/0x2a0

cpuhp_invoke_callback+0x3ad/0x10d0

cpuhp_thread_fun+0x3f5/0x680

smpboot_thread_fn+0x56d/0x8d0

kthread+0x309/0x400

ret_from_fork+0x41/0x70

ret_from_fork_asm+0x1b/0x30

</TASK>

Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(),

the cpu offline failed, but sched_smt_present is decremented before

calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so

fix it by incrementing sched_smt_present in the error path.

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/2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4Refgit.kernel.org/stable/c/2cf7665efe451e48d27953e6b5bc627d518c902bRefgit.kernel.org/stable/c/65727331b60197b742089855ac09464c22b96f66Refgit.kernel.org/stable/c/d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dabRefgit.kernel.org/stable/c/e22f910a26cc2a3ac9c66b8e935ef2a7dd881117Reflists.debian.org/debian-lts-announce/2025/01/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-44958?

CVE-2024-44958 is a medium-severity vulnerability. It was published on September 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-44958?

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-2024-44958?

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-2024-44958?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-44958 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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