CVE-2021-20255
Fixed in a distro release EPSS <1%
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Products: qemu, debian_linux
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | qemu | 11.0.1-r0 |
| Chainguard | qemu-block-iscsi | 11.0.1-r0 |
| Chainguard | qemu-block-rbd | 11.0.1-r0 |
| Chainguard | qemu-edk2-aarch64 | 11.0.1-r0 |
| Chainguard | qemu-edk2-x86_64 | 11.0.1-r0 |
| Chainguard | qemu-ipxe | 11.0.1-r0 |
| Chainguard | qemu-modules | 11.0.1-r0 |
| Chainguard | qemu-modules-spice | 11.0.1-r0 |
| Chainguard | qemu-modules-usb-host | 11.0.1-r0 |
| Chainguard | qemu-system-aarch64 | 11.0.1-r0 |
| Chainguard | qemu-system-x86_64 | 11.0.1-r0 |
| Chainguard | qemu-user | 11.0.1-r0 |
| Chainguard | qemu-user-binfmt | 11.0.1-r0 |
| Chainguard | qemu-utils | 11.0.1-r0 |
| Debian 12 | qemu | no fix |
| Debian 13 | qemu | 1:8.1.0+ds-1 |
| Debian 14 | qemu | 1:8.1.0+ds-1 |
| Debian 9 | qemu | 1:2.8+dfsg-6+deb9u14 |
| SUSE Enterprise Storage 6 | qemu | 3.1.1.1-80.40.1 |
| SUSE HPE Helion OpenStack 8 | xen | 4.9.4_20-3.91.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | qemu | 3.1.1.1-80.40.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | qemu | 3.1.1.1-80.40.1 |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | qemu | 2.11.2-70.59.1 |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | qemu | 2.11.2-70.59.1 |
| SUSE Linux Enterprise Micro 5.0 | qemu | 4.2.1-11.28.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | qemu | 4.2.1-11.28.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | qemu | 5.2.0-103.2 |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | qemu | 4.2.1-11.28.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | qemu | 5.2.0-103.2 |
| SUSE Linux Enterprise Server 11 SP4-LTSS | xen | 4.4.4_50-61.67.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | qemu | 2.6.2-41.73.1 |
| SUSE Linux Enterprise Server 12 SP2-BCL | xen | 4.7.6_16-43.79.5 |
| SUSE Linux Enterprise Server 12 SP3-BCL | xen | 4.9.4_20-3.91.1 |
| SUSE Linux Enterprise Server 12 SP3-LTSS | xen | 4.9.4_20-3.91.1 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | qemu | 2.11.2-5.40.2 |
| SUSE Linux Enterprise Server 12 SP4-LTSS | xen | 4.11.4_20-2.60.1 |
| SUSE Linux Enterprise Server 12 SP5 | qemu | 3.1.1.1-57.2 |
| SUSE Linux Enterprise Server 12 SP5 | xen | 4.12.4_12-3.49.1 |
| SUSE Linux Enterprise Server 15 SP1-BCL | qemu | 3.1.1.1-80.40.1 |
| SUSE Linux Enterprise Server 15 SP1-LTSS | qemu | 3.1.1.1-80.40.1 |
| SUSE Linux Enterprise Server 15-LTSS | qemu | 2.11.2-70.59.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | xen | 4.9.4_20-3.91.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | qemu | 2.11.2-5.40.2 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | xen | 4.11.4_20-2.60.1 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | qemu | 3.1.1.1-57.2 |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | xen | 4.12.4_12-3.49.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 | qemu | 2.11.2-70.59.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | qemu | 3.1.1.1-80.40.1 |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | xen | 4.12.4_12-3.49.1 |
| SUSE OpenStack Cloud 8 | xen | 4.9.4_20-3.91.1 |
| SUSE OpenStack Cloud 9 | qemu | 2.11.2-5.40.2 |
| SUSE OpenStack Cloud 9 | xen | 4.11.4_20-2.60.1 |
| SUSE OpenStack Cloud Crowbar 8 | xen | 4.9.4_20-3.91.1 |
| SUSE OpenStack Cloud Crowbar 9 | qemu | 2.11.2-5.40.2 |
| SUSE OpenStack Cloud Crowbar 9 | xen | 4.11.4_20-2.60.1 |
| Ubuntu 22.04 LTS | qemu | no fix |
| Ubuntu 24.04 LTS | qemu | no fix |
| Ubuntu 25.10 | qemu | no fix |
| 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 |
| Wolfi | qemu | 11.0.1-r0 |
| Wolfi | qemu-block-iscsi | 11.0.1-r0 |
| Wolfi | qemu-block-rbd | 11.0.1-r0 |
| Wolfi | qemu-edk2-aarch64 | 11.0.1-r0 |
| Wolfi | qemu-edk2-x86_64 | 11.0.1-r0 |
| Wolfi | qemu-ipxe | 11.0.1-r0 |
| Wolfi | qemu-modules | 11.0.1-r0 |
| Wolfi | qemu-modules-spice | 11.0.1-r0 |
| Wolfi | qemu-modules-usb-host | 11.0.1-r0 |
| Wolfi | qemu-system-aarch64 | 11.0.1-r0 |
| Wolfi | qemu-system-x86_64 | 11.0.1-r0 |
| Wolfi | qemu-user | 11.0.1-r0 |
| Wolfi | qemu-user-binfmt | 11.0.1-r0 |
| Wolfi | qemu-utils | 11.0.1-r0 |
| openSUSE Leap 15.2 | qemu | 4.2.1-lp152.9.20.1 |
| openSUSE Leap 15.2 | qemu-linux-user | 4.2.1-lp152.9.20.1 |
| openSUSE Leap 15.2 | qemu-testsuite | 4.2.1-lp152.9.20.1 |
| openSUSE Leap 15.3 | qemu | 5.2.0-103.2 |
| openSUSE Leap 15.3 | qemu | 4.2.1-11.28.1 |
| openSUSE Leap 15.3 | qemu | 3.1.1.1-80.40.1 |