Improper locking in Linux kernel - CVE-2025-37791

Vulnerability identifier: #VU108316

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2025-37791

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to improper locking within the ethtool_cmis_module_poll() function in net/ethtool/cmis_cdb.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)

Install update from vendor's website.

Linux kernel - addressed in versions 6.12.25, 6.14.4
linux (Ubuntu package) - addressed in versions 6.14.0-22.22, 6.14.0-1004.4, 6.14.0-1007.7, 6.14.0-1008.8
linux-azure (Ubuntu package) - update to 6.14.0-1007.7
linux-aws (Ubuntu package) - addressed in versions 6.14.0-1007.7, 6.14.0-1007.7+1

• https://git.kernel.org/stable/c/61765e1b417a23371c3735e3cddf4ad9354ed2e9
• https://git.kernel.org/stable/c/7eb0a0072f966bb0b01d8b7d529d9743a7187bd1
• https://git.kernel.org/stable/c/f3fdd4fba16c74697d8bc730b82fb7c1eff7fab3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.25
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.4

• Improper locking in Linux kernel ethtool
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws