CVE-2024-27399

5.5 · MEDIUM

Published May 14, 2024 linux CWE-476 EPSS 0.30% (23th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-27399 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 14, 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:

Bluetooth: l2cap: fix null-ptr-deref in l2cap_chan_timeout

There is a race condition between l2cap_chan_timeout() and

l2cap_chan_del(). When we use l2cap_chan_del() to delete the

channel, the chan->conn will be set to null. But the conn could

be dereferenced again in the mutex_lock() of l2cap_chan_timeout().

As a result the null pointer dereference bug will happen. The

KASAN report triggered by POC is shown below:

[ 472.074580] ==================================================================

[ 472.075284] BUG: KASAN: null-ptr-deref in mutex_lock+0x68/0xc0

[ 472.075308] Write of size 8 at addr 0000000000000158 by task kworker/0:0/7

[ 472.075308]

[ 472.075308] CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.9.0-rc5-00356-g78c0094a146b #36

[ 472.075308] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu4

[ 472.075308] Workqueue: events l2cap_chan_timeout

[ 472.0

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	>= 3.4, < 4.19.314	Affected

References

Frequently Asked Questions

What is CVE-2024-27399?

CVE-2024-27399 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 14, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-27399?

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-2024-27399?

How can CyberStrike help with CVE-2024-27399?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-27399 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

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