CVE-2023-4135: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

A heap out-of-bounds memory read flaw was found in the virtual nvme device in QEMU. The QEMU process does not validate an offset provided by the guest before computing a host heap pointer, which is used for copying data back to the guest. Arbitrary heap memory relative to an allocated buffer can be disclosed.

Affected products

• Fedoraproject Fedora: version 38 only
• Qemu Qemu: from 8.0.0, before 8.1.0 (fixed in 8.1.0); version 8.1.0 only

Published 2023-08-04. Last modified 2026-06-17.