#VU104955 Use-after-free in Linux kernel - CVE-2025-21732
Vulnerability identifier: #VU104955
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-2025-21732
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 mlx5_ib_invalidate_range() function in drivers/infiniband/hw/mlx5/odp.c, within the mlx5_revoke_mr() function in drivers/infiniband/hw/mlx5/mr.c. A local user can escalate privileges on the system.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 6.12, 6.12.1, 6.12.2, 6.12.3, 6.12.4, 6.12.5, 6.12.6, 6.12.7, 6.12.8, 6.12.9, 6.12.10, 6.12.11, 6.12.12, 6.12.13
External links
https://git.kernel.org/stable/c/5297f5ddffef47b94172ab0d3d62270002a3dcc1
https://git.kernel.org/stable/c/abb604a1a9c87255c7a6f3b784410a9707baf467
https://git.kernel.org/stable/c/b13d32786acabf70a7b04ed24b7468fc3c82977c
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.14
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.
