Race condition in Linux kernel - CVE-2026-98468

Vulnerability identifier: #VU156766

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98468

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to trigger spurious kernel warnings.

The vulnerability exists due to incorrect error handling of a benign race condition in the arm64 KVM stage2_apply_range() function when host memory migration overlaps with stage 2 page-table teardown. A local user can trigger concurrent guest teardown and memory migration under host memory pressure to cause __unmap_stage2_range() to emit a spurious warning.

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 kernel - update to 7.0 rc3
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/330346dda3bf5f8a3b06723024f7d906326270cf
• https://git.kernel.org/stable/c/38b70fc453c3112f1a62583b89903ae41116cc27
• https://git.kernel.org/stable/c/c23ed110d27ba99cf3a881986514f79aacedf476
• https://git.kernel.org/stable/c/f44a92633136b409ebb9b7036fceb7e11de60a20

• Race condition in Linux kernel arm64 kvm
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more