Out-of-bounds read in Linux kernel mlx5 core driver

1) Out-of-bounds read

EUVDB-ID: #VU104988

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21717

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the mlx5e_open_xdpredirect_sq() function in drivers/net/ethernet/mellanox/mlx5/core/en_main.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.13 - 6.13.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.13:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.13.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/979284535aaf12a287a2f43d9d5dfcbdc1dc4cac
https://git.kernel.org/stable/c/a275db45b4161d01716559dd7557db9ea0450952
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.2

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.