Race condition in Linux kernel - CVE-2026-90129

Vulnerability identifier: #VU151353

CSH Severity: Low

CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90129

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to improper synchronization in virtio_balloon device shutdown handling when shutting down a virtio balloon device while asynchronous balloon work is armed. A local privileged user can trigger device shutdown while balloon work is armed to cause a denial of service.

Systems configured with panic_on_warn can panic during device shutdown.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/6dd28e32f4d81a0d57c732b9900de24184e60a7d
• https://git.kernel.org/stable/c/7e17eef04600c399c7e0f5ce765da5cf9d40d8e1
• https://git.kernel.org/stable/c/bdef50a8226fc04899ef6815dd08a002247d47d5

• Race condition in Linux kernel virtio driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more