How severe is CVE-2020-25653?

CVE-2020-25653 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2020-25653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25653?

CVE-2020-25653 primarily affects Spice-space Spice-vdagent. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-25653?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-25653 published?

CVE-2020-25653 was published on 2020-11-26 and last updated on 2026-06-17.

CVE-2020-25653

CVE-2020-25653 is a medium-severity vulnerability in Spice-space Spice-vdagent with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 5.4
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Spice-space Spice-vdagent
Published: 2020-11-26
Last modified: 2026-06-17

Description

A race condition vulnerability was found in the way the spice-vdagentd daemon handled new client connections. This flaw may allow an unprivileged local guest user to become the active agent for spice-vdagentd, possibly resulting in a denial of service or information leakage from the host. The highest threat from this vulnerability is to data confidentiality as well as system availability. This flaw affects spice-vdagent versions 0.20 and prior.

Frequently asked questions

What is CVE-2020-25653?: A race condition vulnerability was found in the way the spice-vdagentd daemon handled new client connections. This flaw may allow an unprivileged local guest user to become the active agent for spice-vdagentd, possibly resulting in a denial of service or information leakage from the host. The highest threat from this vulnerability is to data confidentiality as well as system availability. This flaw affects spice-vdagent versions 0.20 and prior.
How severe is CVE-2020-25653?: CVE-2020-25653 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2020-25653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25653?: CVE-2020-25653 primarily affects Spice-space Spice-vdagent. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-25653?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-25653 published?: CVE-2020-25653 was published on 2020-11-26 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:spice-space:spice-vdagent:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

More vulnerabilities in Spice-space Spice-vdagent

CVE-2017-15108 — High (CVSS 7.8): spice-vdagent up to and including 0.17.0 does not properly escape save directory before passing to shell, allowing…
CVE-2020-25651 — Medium (CVSS 6.4): A flaw was found in the SPICE file transfer protocol. File data from the host system can end up in full or in parts in…
CVE-2020-25652 — Medium (CVSS 5.5): A flaw was found in the spice-vdagentd daemon, where it did not properly handle client connections that can be…
CVE-2020-25650 — Medium (CVSS 5.5): A flaw was found in the way the spice-vdagentd daemon handled file transfers from the host system to the virtual…
CVE-2026-57965 — Medium (CVSS 5.1): A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow by sending a…
CVE-2026-57966 — Medium (CVSS 4.4): A path traversal vulnerability was found in spice-vdagent. This flaw allows a malicious or compromised SPICE host to…

All CVEs affecting Spice-space Spice-vdagent →

Other CWE-362 (Race Condition) vulnerabilities

CVE-2022-27626 — Critical (CVSS 10.0): A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition')…
CVE-2015-8556 — Critical (CVSS 10.0): Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
CVE-2014-0703 — Critical (CVSS 10.0): Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS software with a race condition…
CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
CVE-2026-46137 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential…

Browse all CWE-362 (Race Condition) vulnerabilities →