#VU104965 Use-after-free in Linux kernel - CVE-2025-21714

Vulnerability identifier: #VU104965

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-2025-21714

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 destroy_unused_implicit_child_mr() and implicit_get_child_mr() functions in drivers/infiniband/hw/mlx5/odp.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.13 - 6.13.1

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External links
https://git.kernel.org/stable/c/7cc8f681f6d4ae4478ae0f60485fc768f2b450da
https://git.kernel.org/stable/c/d3d930411ce390e532470194296658a960887773
https://git.kernel.org/stable/c/edfb65dbb9ffd3102f3ff4dd21316158e56f1976
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.2

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?