Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2022-49540

4.7 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: rcu-tasks: Fix race in schedule and flush work While booting secondary CPUs, cpus_read_[lock/unlock] is not keeping online cpum…

Published Feb 26, 2025CWE-362EPSS 0.19%

Overview

CVE-2022-49540 is a medium-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.7, 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:

rcu-tasks: Fix race in schedule and flush work

While booting secondary CPUs, cpus_read_[lock/unlock] is not keeping

online cpumask stable. The transient online mask results in below

calltrace.

[ 0.324121] CPU1: Booted secondary processor 0x0000000001 [0x410fd083]

[ 0.346652] Detected PIPT I-cache on CPU2

[ 0.347212] CPU2: Booted secondary processor 0x0000000002 [0x410fd083]

[ 0.377255] Detected PIPT I-cache on CPU3

[ 0.377823] CPU3: Booted secondary processor 0x0000000003 [0x410fd083]

[ 0.379040] ------------[ cut here ]------------

[ 0.383662] WARNING: CPU: 0 PID: 10 at kernel/workqueue.c:3084 __flush_work+0x12c/0x138

[ 0.384850] Modules linked in:

[ 0.385403] CPU: 0 PID: 10 Comm: rcu_tasks_rude_ Not tainted 5.17.0-rc3-v8+ #13

[ 0.386473] Hardware name: Raspberry Pi 4 Model B Rev 1.4 (DT)

[ 0.387289] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)

[ 0.388308] pc :

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/1c6c3f2336642fb3074593911f5176565f47ec41Refgit.kernel.org/stable/c/230bf5878af6038dfb63d9184272a58475236580Refgit.kernel.org/stable/c/8f49a8758b5cd541bd7aa9a0d0d11c7426141c0eRefgit.kernel.org/stable/c/ba722d061bc4b54802d701fc63fc2fd988934603Refgit.kernel.org/stable/c/f75fd4b9221d93177c50dcfde671b2e907f53e86

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49540?

CVE-2022-49540 is a medium-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2022-49540?

This vulnerability has a CVSS 3.1 base score of 4.7, 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-2022-49540?

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-2022-49540?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49540 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.

Related MEDIUM CVEs from 2022

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999