#VU94216 Use-after-free in Linux kernel - CVE-2024-40956

Vulnerability identifier: #VU94216

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-40956

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the irq_process_work_list() function in drivers/dma/idxd/irq.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15 - 5.15.161, 6.1 - 6.1.95, 6.6 - 6.6.35

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External links
https://git.kernel.org/stable/c/1b08bf5a17c66ab7dbb628df5344da53c8e7ab33
https://git.kernel.org/stable/c/83163667d881100a485b6c2daa30301b7f68d9b5
https://git.kernel.org/stable/c/faa35db78b058a2ab6e074ee283f69fa398c36a8
https://git.kernel.org/stable/c/a14968921486793f2a956086895c3793761309dd
https://git.kernel.org/stable/c/e3215deca4520773cd2b155bed164c12365149a7
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.162
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.96
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.36

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?