Resource exhaustion in Linux kernel - CVE-2026-90127

Vulnerability identifier: #VU151351

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90127

CWE-ID: CWE-400

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause device removal to hang.

The vulnerability exists due to missing timeout handling in virtio RTC alarm request handling when a pending alarm request does not receive a device response during surprise device removal. A local user can issue an alarm request while the virtio device stops responding to cause device removal to hang.

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/28701b74c22d2a43ddf7aebb6378e60c18323865
• https://git.kernel.org/stable/c/68e00d9212929805b40dcb9166755610f4f4acee
• https://git.kernel.org/stable/c/afbf69d1d691c06d093d7c3f17168ecb608c4977

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