Description
A flaw was found in the spice-vdagentd daemon, where it did not properly handle client connections that can be established via the UNIX domain socket in `/run/spice-vdagentd/spice-vdagent-sock`. Any unprivileged local guest user could use this flaw to prevent legitimate agents from connecting to the spice-vdagentd daemon, resulting in a denial of service. The highest threat from this vulnerability is to system availability. This flaw affects spice-vdagent versions 0.20 and prior.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | spice-vdagent | spice-vdagent versions 0.20 and prior | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | spice-vdagent | 0.20.0-2 | — |
| Debian 13 | spice-vdagent | 0.20.0-2 | — |
| Debian 12 | spice-vdagent | 0.20.0-2 | — |
| Debian 9 | spice-vdagent | 0.17.0-1+deb9u1 | DLA-2524-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | spice-vdagent | 0.19.0-2ubuntu0.2 | USN-4617-1 |
| Ubuntu 18.04 LTS | spice-vdagent | 0.17.0-1ubuntu2.2 | USN-4617-1 |
| Ubuntu 16.04 LTS | spice-vdagent | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | spice-vdagent | 0.20.0-3.el8 | RHSA-2021:1791 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | spice-vdagent | 0.20.0-3.el8 | ALSA-2021:1791 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | spice-vdagent | 0.20.0-3.el8 | RLSA-2021:1791 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | spice-vdagent | 0.21.0-3.3.1 | SUSE-SU-2021:2614-1 |
| SLES 15 SP2 | spice-vdagent | 0.19.0-3.3.1 | SUSE-SU-2020:3268-1 |
| SLES 15 SP1 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SLES 15 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SLES 12 SP5 | spice-vdagent | 0.16.0-8.8.2 | SUSE-SU-2021:2766-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP1 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SLES for SAP 15 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SLES for SAP 12 SP5 | spice-vdagent | 0.16.0-8.8.2 | SUSE-SU-2021:2766-1 |
| SLE HPC 15 SP1 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SLE HPC 15 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SUSE Manager Server 4.0 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SUSE Manager Retail Branch Server 4.0 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SUSE Manager Proxy 4.0 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
| SUSE Enterprise Storage 6 | spice-vdagent | 0.17.0-4.3.1 | SUSE-SU-2021:2803-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | spice-vdagent | 0.21.0-3.3.1 | openSUSE-SU-2021:2614-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | spice-vdagent | 0.22.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | spice-vdagent | 0.20.0-3.el8 | ELSA-2021-1791 |
Advisories 11
- ALSA-2021:1791 Moderate: spice-vdagent security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:1791 Red Hat Security Advisory: spice-vdagent security and bug fix update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- USN-4617-1 spice-vdagent vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2524-1 spice-vdagent - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:1791 Moderate: spice-vdagent security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- SUSE-SU-2021:2614-1 Security update for spice-vdagent SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2803-1 Security update for spice-vdagent SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2614-1 Security update for spice-vdagent SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3268-1 Security update for spice-vdagent SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2766-1 Security update for spice-vdagent SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2021-1791 Moderate: spice-vdagent security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021