PatchTheCVECVE-2021-20201: A flaw was found in spice in versions before 0.14.92
CVE-2021-20201 is a medium-severity flaw (CVSS 5.3) affecting spice, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 2.7% (top 14%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2021-05-28 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-20201?
spice: upgrade to 0.14.92; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2021-20201 being exploited?
CVE-2021-20201 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-20201 affect?
CVE-2021-20201 affects spice, enterprise linux. Severity is medium (CVSS 5.3). A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.
How urgent is CVE-2021-20201?
Priority 55/100. Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist
Related CVEs
- CVE-2020-14355 MEDIUM 6.6 UPGRADE DOWNGRADE Multiple buffer overflow vulnerabilities were found in the QUIC image decoding process of the SPICE remote dis
- CVE-2019-3813 HIGH 7.5 UPGRADE MITIGATE Spice, versions 0.5.2 through 0.14.1, are vulnerable to an out-of-bounds read due to an off-by-one error in me
- CVE-2018-10893 HIGH 7.6 MITIGATE Multiple integer overflow and buffer overflow issues were discovered in spice-client's handling of LZ compress
- CVE-2018-10873 HIGH 8.3 UPGRADE MITIGATE A vulnerability was discovered in SPICE before version 0.14.1 where the generated code used for demarshalling
- CVE-2017-7506 HIGH 8.8 DOWNGRADE spice versions though 0.13 are vulnerable to out-of-bounds memory access when processing specially crafted mes