Improper locking in Linux kernel - CVE-2025-37894

Vulnerability identifier: #VU109535

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-2025-37894

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 tcp6_check_fraglist_gro() function in net/ipv6/tcpv6_offload.c, within the tcp4_check_fraglist_gro() function in net/ipv4/tcp_offload.c. A local user can perform a denial of service (DoS) attack.

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 - addressed in versions 6.12.28, 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/786650e644c5b1c063921799ca203c0b8670d79a
• https://git.kernel.org/stable/c/c0dba059b118b5206e755042b15b49368a388898
• https://git.kernel.org/stable/c/f920436a44295ca791ebb6dae3f4190142eec703
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.28
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.6

• Improper locking in Linux kernel ipv4
• 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