Improper locking in Linux kernel - CVE-2025-37843

Vulnerability identifier: #VU108870

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-2025-37843

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 pciehp_suspend() function in drivers/pci/hotplug/pciehp_core.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux-oem-6.11 (Ubuntu package)
linux (Ubuntu package)
linux-azure (Ubuntu package)
linux-aws (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.12.24
linux-oem-6.11 (Ubuntu package) - update to 6.11.0-1024.24
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/0d0bbd01f7c0ac7d1be9f85aaf2cd0baec34655f
• https://git.kernel.org/stable/c/7535d10a2c61baeff493300070cf04d9ddda216b
• https://git.kernel.org/stable/c/e3260237aaadc9799107ccb940c6688195c4518d
• https://git.kernel.org/stable/c/e4a1d7defbc2d806540720a5adebe24ec3488683
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.24

• Improper locking in Linux kernel pci hotplug driver
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-6.11
• Ubuntu update for linux-aws