CVE-2026-0665

An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption.

Score

CVSS 3.1 6.5 Medium

Status

Deferred - patrick@puiterwijk.org

Published

2026-02-18

Last modified

2026-02-18

Weaknesses

CWE-787

Affected products

• Enterprise Linux (Redhat)
• Openshift (Redhat)

References

• https://access.redhat.com/security/cve/CVE-2026-0665
• https://bugzilla.redhat.com/show_bug.cgi?id=2428640