CVE-2024-40912

5.5 · MEDIUM

Published Jul 12, 2024 linux CWE-667 EPSS 0.22% (13th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-40912 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 12, 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:

wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()

The ieee80211_sta_ps_deliver_wakeup() function takes sta->ps_lock to

synchronizes with ieee80211_tx_h_unicast_ps_buf() which is called from

softirq context. However using only spin_lock() to get sta->ps_lock in

ieee80211_sta_ps_deliver_wakeup() does not prevent softirq to execute

on this same CPU, to run ieee80211_tx_h_unicast_ps_buf() and try to

take this same lock ending in deadlock. Below is an example of rcu stall

that arises in such situation.

rcu: INFO: rcu_sched self-detected stall on CPU

rcu: 2-....: (42413413 ticks this GP) idle=b154/1/0x4000000000000000 softirq=1763/1765 fqs=21206996

rcu: (t=42586894 jiffies g=2057 q=362405 ncpus=4)

CPU: 2 PID: 719 Comm: wpa_supplicant Tainted: G W 6.4.0-02158-g1b062f552873 #742

Hardware name: RPT (r1) (DT)

pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : queu

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	>= 3.14, < 4.19.317	Affected

References

Frequently Asked Questions

What is CVE-2024-40912?

CVE-2024-40912 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 12, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-40912?

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-2024-40912?

How can CyberStrike help with CVE-2024-40912?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-40912 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.

How CyberStrike Helps

Autonomous Discovery

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HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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