#VU112178 Use-after-free in Linux kernel - CVE-2025-38106

Vulnerability identifier: #VU112178

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-2025-38106

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 io_sq_thread() and io_sq_offload_create() functions in io_uring/sqpoll.c, within the __io_uring_show_fdinfo() function in io_uring/fdinfo.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/ac0b8b327a5677dc6fecdf353d808161525b1ff0
https://git.kernel.org/stable/c/af8c13f9ee040b9a287ba246cf0055f7c77b7cc8
https://git.kernel.org/stable/c/d0932758a0a77b38ba1b39564f3b7aba12407061

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?