Use-after-free in Linux kernel hw mlx5 driver



| Updated: 2025-05-14
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2023-52851
CWE-ID CWE-416
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU90076

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-2023-52851

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

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_stage_post_ib_reg_umr_init() function in drivers/infiniband/hw/mlx5/main.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.7 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/437f033e30c897bb3723eac9e9003cd9f88d00a3
https://git.kernel.org/stable/c/4f4a7a7d1404297f2a92df0046f7e64dc5c52dd9
https://git.kernel.org/stable/c/6387f269d84e6e149499408c4d1fc805017729b2
https://git.kernel.org/stable/c/2ef422f063b74adcc4a4a9004b0a87bb55e0a836
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.63
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.2
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7


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.



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