CVE-2026-3842
Fixed in a distro release EPSS <1%CVSS 7.8
A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.
Products: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | qemu | no fix |
| Debian 13 | qemu | 1:10.0.10+ds-0+deb13u1 |
| Debian 14 | qemu | 1:10.2.2+ds-1 |
| SUSE Linux Enterprise Micro 5.5 | qemu | 7.1.0-150500.49.42.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | qemu | 9.2.4-150700.3.20.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | qemu | 9.2.4-150700.3.20.1 |
| SUSE Linux Enterprise Module for Package Hub 15 SP7 | qemu-linux-user | 9.2.4-150700.3.20.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | qemu | 7.1.0-150500.49.42.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | qemu | 9.2.4-150700.3.20.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | qemu | 8.2.10-150600.3.49.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | qemu | 8.2.10-150600.3.49.1 |
| Ubuntu 22.04 LTS | qemu | 1:6.2+dfsg-2ubuntu6.30 |
| Ubuntu 24.04 LTS | qemu | 1:8.2.2+ds-0ubuntu1.16 |
| Ubuntu 25.10 | qemu | 1:10.1.0+ds-5ubuntu2.6 |
| Ubuntu 26.04 LTS | qemu | no fix |
| Ubuntu 26.04 LTS | qemu-hwe | no fix |
| Ubuntu 26.10 | qemu | no fix |
| Ubuntu 26.10 | qemu-hwe | no fix |
| Ubuntu Pro 14.04 LTS | qemu | no fix |
| Ubuntu Pro 16.04 LTS | qemu | no fix |
| Ubuntu Pro 18.04 LTS | qemu | no fix |
| Ubuntu Pro 20.04 LTS | qemu | no fix |