# CVE-2020-25653: spice-vdagent: A race condition vulnerability was found in the way the spice-vdagentddaemon handled new client connections

CVE-2020-25653 is fixed in spice-vdagent on 1 platform, first by spice-vdagent 0.17.0-1ubuntu2.2, released November 2, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-25653
- Priority: Routine
- CVSS: 6.4 (Low)
- EPSS: 0.0033
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 2, 2020

## Description

A race condition vulnerability was found in the way the spice-vdagentddaemon handled new client connections. This flaw may allow an unprivilegedlocal guest user to become the active agent for spice-vdagentd, possiblyresulting in a denial of service or information leakage from the host. Thehighest threat from this vulnerability is to data confidentiality as wellas system availability. This flaw affects spice-vdagent versions 0.20 andprior.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | spice-vdagent RHEL 8 | 0:0.20.0-3.el8 | [RHSA-2021:1791](https://patchblox.com/security/data/fix/linux/rhsa-2021-1791.md) | May 18, 2021 |
| Linux | spice-vdagent Ubuntu 18.04.6 LTS (bionic) | 0.17.0-1ubuntu2.2 | [spice-vdagent 0.17.0-1ubuntu2.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-spice-vdagent-0.17.0-1ubuntu2.2.md) | Nov 2, 2020 |
| Linux | spice-vdagent Ubuntu 20.04 LTS (focal) | 0.19.0-2ubuntu0.2 | [spice-vdagent 0.19.0-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-focal-spice-vdagent-0.19.0-2ubuntu0.2.md) | Nov 2, 2020 |
| Linux | spice-vdagent Ubuntu 24.10 (oracular) | 0.20.0-1ubuntu0.1 | [spice-vdagent 0.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-spice-vdagent-0.20.0-1ubuntu0.1.md) | Nov 3, 2020 |
| Linux | spice-vdagent Ubuntu 25.04 (plucky) | 0.20.0-1ubuntu0.1 | [spice-vdagent 0.20.0-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-spice-vdagent-0.20.0-1ubuntu0.1.md) | Nov 3, 2020 |
| Linux | spice-vdagent ol 8 | 0:0.20.0-3.el8 | [ELSA-2021-1791](https://patchblox.com/security/data/fix/linux/elsa-2021-1791.md) | May 25, 2021 |

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Data as of 2026-11-08T00:53:09Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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