#VU112752 Use-after-free in Linux kernel - CVE-2025-38263

Vulnerability identifier: #VU112752

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-2025-38263

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 CLOSURE_CALLBACK() function in drivers/md/bcache/super.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/1e46ed947ec658f89f1a910d880cd05e42d3763e
https://git.kernel.org/stable/c/1f25f2d3fa29325320c19a30abf787e0bd5fc91b
https://git.kernel.org/stable/c/3f9e128186c99a117e304f1dce6d0b9e50c63cd8
https://git.kernel.org/stable/c/553f560e0a74a7008ad9dba05c3fd05da296befb
https://git.kernel.org/stable/c/667c3f52373ff5354cb3543e27237eb7df7b2333
https://git.kernel.org/stable/c/c4f5e7e417034b05f5d2f5fa9a872db897da69bd

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?