#VU82761 Use-after-free in Linux kernel - CVE-2023-1252

Vulnerability identifier: #VU82761

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-2023-1252

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 authenticated user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the Linux kernel’s Ext4 File System in how a user triggers several file operations simultaneously with the overlay FS usage. A local authenticated user can trigger a use-after-free error and escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15 - 5.15.2

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External links
https://lore.kernel.org/lkml/20211115165433.449951285@linuxfoundation.org/
https://security.netapp.com/advisory/ntap-20230505-0005/

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?