Improper locking in Linux kernel - CVE-2026-72409

Vulnerability identifier: #VU143032

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-2026-72409

CWE-ID: CWE-667

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 state management in the mvneta resume path when resuming the system while NAPI poll is pending after a per-CPU interrupt has been disabled. A local user can trigger a suspend and resume sequence during this condition to cause a denial of service.

This affects Marvell MPIC platforms using the mvneta driver, where the per-CPU interrupt can remain masked after resume and result in complete loss of network connectivity.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1036.39+1
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux (Ubuntu package) - addressed in versions 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

• https://git.kernel.org/stable/c/1cc312dc8bc78fa24c80d5bc193dbf5b57a99cc6
• https://git.kernel.org/stable/c/5bdb33ff6e58bdc43632e98b30723eb65352d671
• https://git.kernel.org/stable/c/82c13027ed283b856017adee970dbfdffce5c6b8
• https://git.kernel.org/stable/c/8c7a489aa71d2693752b2e794a68bf672d16c829
• https://git.kernel.org/stable/c/b84dd48f9da1eb132bdc06a944423cd5a1641ef1
• https://git.kernel.org/stable/c/be626ac1faadd49c2cead9f9cd06ba8752d81563
• https://git.kernel.org/stable/c/bf88cd3b649bc3e638f1e8a77649581852747a68
• https://git.kernel.org/stable/c/fd398d6480987e4c84fff0aaab6b9d6642a93343

• Improper locking in Linux kernel ethernet marvell driver
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux-nvidia-tegra
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0