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CVE-2024-26746

5.5 · MEDIUM

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 f…

Published Apr 4, 2024EPSS 0.22%

Overview

CVE-2024-26746 is a medium-severity vulnerability. 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, 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/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4Refgit.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7Refgit.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283abRefgit.kernel.org/stable/c/5e3022ea42e490a36ec6f2cfa6fc603deb0bace4Refgit.kernel.org/stable/c/bb71e040323175e18c233a9afef32ba14fa64eb7Refgit.kernel.org/stable/c/d3ea125df37dc37972d581b74a5d3785c3f283ab

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26746?

CVE-2024-26746 is a medium-severity vulnerability. 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?

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-2024-26746?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26746 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.

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