CVE-2024-44958

5.5 · MEDIUM

Published Sep 4, 2024 linux EPSS 0.21% (12th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-44958 is a medium-severity vulnerability affecting linux linux_kernel. 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 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

Vendor	Product	Versions	Status
linux	linux_kernel	>= 4.14.86, < 4.15	Affected

References

Ref git.kernel.org/stable/c/2a3548c7ef2e135aee40e7e5e44e7d11b893e7c4 Ref git.kernel.org/stable/c/2cf7665efe451e48d27953e6b5bc627d518c902b Ref git.kernel.org/stable/c/65727331b60197b742089855ac09464c22b96f66 Ref git.kernel.org/stable/c/d0c87a3c6be10a57aa3463c32c3fc6b2a47c3dab Ref git.kernel.org/stable/c/e22f910a26cc2a3ac9c66b8e935ef2a7dd881117 Ref lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-44958?

CVE-2024-44958 is a medium-severity vulnerability affecting linux linux_kernel. 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?

How can CyberStrike help with CVE-2024-44958?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-44958 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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