Race condition in Linux kernel - CVE-2025-37906

Vulnerability identifier: #VU109560

CSH Severity: Low

CVSS v4: 8.5 [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]

CVE-ID: CVE-2025-37906

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition within the ublk_start_cancel(), ublk_uring_cmd_cancel_fn() and ublk_cancel_queue() functions in drivers/block/ublk_drv.c. A local user can escalate privileges on the system.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-oem-6.14 (Ubuntu package)
linux-aws (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws-6.14 (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.14.6
linux (Ubuntu package) - addressed in versions 6.14.0-24.24, 6.14.0-1006.6, 6.14.0-1009.9, 6.14.0-1011.11
linux-oem-6.14 (Ubuntu package) - update to 6.14.0-1007.7
linux-aws (Ubuntu package) - update to 6.14.0-1009.9
linux-oracle (Ubuntu package) - update to 6.14.0-1009.9
linux-aws-6.14 (Ubuntu package) - update to 6.14.0-1009.9~24.04.1

• https://git.kernel.org/stable/c/f40139fde5278d81af3227444fd6e76a76b9506d
• https://git.kernel.org/stable/c/fb2eb9ddf556f93fef45201e1f9d2b8674bcc975
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.6

• Race condition in Linux kernel block driver
• Ubuntu update for linux-oem-6.14
• Ubuntu update for linux
• Ubuntu update for linux-aws
• Ubuntu update for linux-oracle
• Ubuntu update for linux-aws-6.14