CVE-2024-26746

5.5 · MEDIUM

Published Apr 4, 2024 linux 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-2024-26746 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 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:

dmaengine: idxd: Ensure safe user copy of completion record

If CONFIG_HARDENED_USERCOPY is enabled, copying completion record from

event log cache to user triggers a kernel bug.

[ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object 'dsa0' (offset 74, size 31)!

[ 1987.170845] ------------[ cut here ]------------

[ 1987.176086] kernel BUG at mm/usercopy.c:102!

[ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI

[ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5

[ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023

[ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd]

[ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90

[ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff <0f> 0b 49 c7 c1 9e 42 61 9c

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	>= 6.4, < 6.6.21	Affected

References

Ref git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4 Ref git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7 Ref git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab Ref git.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4 Ref git.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7 Ref git.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab

Frequently Asked Questions

What is CVE-2024-26746?

CVE-2024-26746 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26746?

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-2024-26746?

How can CyberStrike help with CVE-2024-26746?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26746 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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