# CVE-2021-20181: qemu-system-mips: A race condition flaw was found in the 9pfs server implementation of QEMUup to and including 5.2.0

CVE-2021-20181 is fixed in 25 products on 1 platform, first by qemu 1:2.11+dfsg-1ubuntu7.35, released January 31, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-20181
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 31, 2021

## Description

A race condition flaw was found in the 9pfs server implementation of QEMUup to and including 5.2.0. This flaw allows a malicious 9p client to causea use-after-free error, potentially escalating their privileges on thesystem. The highest threat from this vulnerability is to confidentiality,integrity as well as system availability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | qemu Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-block-extra Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-block-extra 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-block-extra-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-block-extra Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-block-extra 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-block-extra-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-block-extra Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-block-extra 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-block-extra-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-block-extra Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-block-extra 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-block-extra-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-block-supplemental Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-block-supplemental 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-block-supplemental-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-block-supplemental Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-block-supplemental 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-block-supplemental-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-guest-agent Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-guest-agent 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-guest-agent-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-guest-agent Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-guest-agent 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-guest-agent-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-guest-agent Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-guest-agent 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-guest-agent-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-guest-agent Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-guest-agent 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-guest-agent-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-kvm Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-kvm 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-kvm-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-kvm Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-kvm 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-kvm-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-arm Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-arm 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-arm-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-arm Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-arm 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-arm-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-arm Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-arm 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-arm-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-arm Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-arm 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-arm-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-common Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-common 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-common-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-common Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-common 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-common-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-common Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-common 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-common-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-common Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-common 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-common-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-data Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-data 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-data-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-data Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-data 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-data-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-data Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-data 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-data-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-gui Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-gui 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-gui-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-gui Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-gui 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-gui-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-gui Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-gui 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-gui-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-mips Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-mips 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-mips-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-mips Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-mips 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-mips-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-mips Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-mips 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-mips-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-mips Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-mips 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-mips-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-misc Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-misc 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-misc-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-misc Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-misc 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-misc-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-misc Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-misc 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-misc-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-misc Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-misc 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-misc-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-modules-opengl Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-modules-opengl 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-modules-opengl-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-modules-opengl Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-modules-opengl 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-modules-opengl-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-modules-spice Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-modules-spice 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-modules-spice-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-modules-spice Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-modules-spice 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-modules-spice-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-ppc Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-ppc 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-ppc-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-ppc Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-ppc 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-ppc-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-ppc Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-ppc 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-ppc-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-ppc Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-ppc 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-ppc-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-s390x Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-s390x 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-s390x-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-s390x Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-s390x 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-s390x-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-s390x Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-s390x 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-s390x-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-s390x Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-s390x 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-s390x-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-sparc Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-sparc 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-sparc-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-sparc Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-sparc 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-sparc-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-sparc Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-sparc 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-sparc-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-sparc Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-sparc 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-sparc-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-x86 Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-system-x86 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-x86-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-system-x86 Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-x86 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-x86-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-x86 Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-x86 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-x86-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-x86 Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-x86 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-x86-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-x86-microvm Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-x86-microvm 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-x86-microvm-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-x86-xen Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-system-x86-xen 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-system-x86-xen-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-system-x86-xen Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-x86-xen 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-x86-xen-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-x86-xen Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-x86-xen 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-x86-xen-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-xen Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-xen 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-system-xen-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-system-xen Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-system-xen 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-system-xen-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-user Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-user 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-user-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-user Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-user 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-user-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-user Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-user 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-user-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-user Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-user 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-user-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-user-binfmt Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-user-binfmt 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-user-binfmt-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-user-binfmt Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-user-binfmt 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-user-binfmt-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-user-binfmt Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-user-binfmt 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-user-binfmt-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-user-binfmt Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-user-binfmt 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-user-binfmt-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-user-static Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-user-static 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-user-static-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-user-static Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-user-static 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-user-static-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-user-static Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-user-static 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-user-static-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-user-static Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-user-static 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-user-static-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-utils Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.35 | [qemu-utils 1:2.11+dfsg-1ubuntu7.35](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-utils-1-2.11-dfsg-1ubuntu7.35.md) | Jan 31, 2021 |
| Linux | qemu-utils Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.12 | [qemu-utils 1:4.2-3ubuntu6.12](https://patchblox.com/security/data/fix/linux/ubuntu-focal-qemu-utils-1-4.2-3ubuntu6.12.md) | Jan 31, 2021 |
| Linux | qemu-utils Ubuntu 24.10 (oracular) | 1:5.2+dfsg-6ubuntu2 | [qemu-utils 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-qemu-utils-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |
| Linux | qemu-utils Ubuntu 25.04 (plucky) | 1:5.2+dfsg-6ubuntu2 | [qemu-utils 1:5.2+dfsg-6ubuntu2](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-qemu-utils-1-5.2-dfsg-6ubuntu2.md) | Jan 16, 2026 |

---

Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.