Integer overflow in Linux kernel - CVE-2026-31590
Published: April 25, 2026
Vulnerability identifier: #VU127804
CSH Severity: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-31590
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of an integer overflow condition in sev_pin_memory() when processing a KVM_MEMORY_ENCRYPT_REG_REGION ioctl request with a crafted size value. A local user can submit a specially crafted ioctl request to cause a kernel warning.
The issue is reachable from userspace through the KVM SEV memory encryption region registration interface.
Remediation
Install security update from vendor's repository.