Improper control of a resource through its lifetime in Linux kernel - CVE-2026-72041

Vulnerability identifier: #VU143547

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-2026-72041

CWE-ID: CWE-664

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource management in espintcp_sendskmsg_locked in net/xfrm/espintcp.c when handling partial sends of sk_msg data. A local user can trigger partial send conditions to cause a denial of service.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-gcp (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-34.34, 7.0.0-34.34.1, 7.0.0-34.34~24.04.1, 7.0.0-1012.12~24.04.1, 7.0.0-1013.13, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1020.20
linux-gcp (Ubuntu package) - addressed in versions 7.0.0-1013.13, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14

• https://git.kernel.org/stable/c/007800408002d871f5699bdb944f985896730b8f
• https://git.kernel.org/stable/c/14c0b42c8a2cd9b5361bbff45b52f69c62c6a286
• https://git.kernel.org/stable/c/54d73f18f8919735f4d04d6f43374f75756c0180
• https://git.kernel.org/stable/c/a338ce41bc933d8f74c39d9b3b6f1d8ca53d9714
• https://git.kernel.org/stable/c/a66d45e0ce6d73cd79962d422388e61bfaf0cb50

• Improper control of a resource through its lifetime in Linux kernel xfrm
• Ubuntu update for linux-gcp
• Ubuntu update for linux