CVE-2024-43911

5.5 · MEDIUM

Published Aug 26, 2024 linux CWE-476 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-2024-43911 is a medium-severity vulnerability affecting linux linux_kernel. It was published on August 26, 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 NULL dereference at band check in starting tx ba session

In MLD connection, link_data/link_conf are dynamically allocated. They

don't point to vif->bss_conf. So, there will be no chanreq assigned to

vif->bss_conf and then the chan will be NULL. Tweak the code to check

ht_supported/vht_supported/has_he/has_eht on sta deflink.

Crash log (with rtw89 version under MLO development):

[ 9890.526087] BUG: kernel NULL pointer dereference, address: 0000000000000000

[ 9890.526102] #PF: supervisor read access in kernel mode

[ 9890.526105] #PF: error_code(0x0000) - not-present page

[ 9890.526109] PGD 0 P4D 0

[ 9890.526114] Oops: 0000 [#1] PREEMPT SMP PTI

[ 9890.526119] CPU: 2 PID: 6367 Comm: kworker/u16:2 Kdump: loaded Tainted: G OE 6.9.0 #1

[ 9890.526123] Hardware name: LENOVO 2356AD1/2356AD1, BIOS G7ETB3WW (2.73 ) 11/28/2018

[ 9890.526126] Workqueue: phy2 rtw89_core_ba_work [rtw89_core]

[ 989

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	>= 0, < 6.10.5	Affected

References

Ref git.kernel.org/stable/c/021d53a3d87eeb9dbba524ac515651242a2a7e3b Ref git.kernel.org/stable/c/a5594c1e03b0df3908b1e1202a1ba34422eed0f6 Ref lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-43911?

CVE-2024-43911 is a medium-severity vulnerability affecting linux linux_kernel. It was published on August 26, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-43911?

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-2024-43911?

How can CyberStrike help with CVE-2024-43911?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-43911 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

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HackBrowser

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

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