#VU78002 Use-after-free in Linux kernel - CVE-2023-3269

Vulnerability identifier: #VU78002

Vulnerability risk: Low

CVSSv4.0: 6.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2023-3269

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: Yes

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 in the handling of stack expansion within the memory management subsystem in the Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code on the system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://seclists.org/oss-sec/2023/q3/4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9471f1f2f50282b9e8f59198ec6bb738b4ccc009

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.