CVE-2021-20201

mediumpriority · track · 22EPSS 0.027 · 86 %ileEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
2.70% (86th) EPSS
CVSS 5 · medium
Is it mine?
33 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-28

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedspice-0:0.14.3-4.el8.src as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-debugsource-0:0.14.3-4.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-debugsource-0:0.14.3-4.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-debugsource-0:0.14.3-4.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-debugsource-0:0.14.3-4.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-debugsource-0:0.14.3-4.el8.x86_64 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-debugsource-0:0.14.3-4.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-0:0.14.3-4.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-0:0.14.3-4.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-0:0.14.3-4.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-debuginfo-0:0.14.3-4.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-debuginfo-0:0.14.3-4.el8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-debuginfo-0:0.14.3-4.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-debuginfo-0:0.14.3-4.el8.i686 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-debuginfo-0:0.14.3-4.el8.x86_64 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-debuginfo-0:0.14.3-4.el8.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-devel-0:0.14.3-4.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-devel-0:0.14.3-4.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
  • Fixedspice-server-devel-0:0.14.3-4.el8.x86_64 as a component of Red Hat CodeReady Linux Builder (v. 8)redhat_csaf

    For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 All applications using SPICE (most notably all QEMU-KVM instances using the SPICE console) must be restarted for this update to take effect.

    https://access.redhat.com/errata/RHSA-2021:1924
02

cvss

Technical severity, 0–10. One row per scoring source.

5.3
010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USexploitability 3.9 · impact 1.4
v3.15.3mediumAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU
v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)
v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Lsecondary · Red Hat Product Security US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USCWE-400USCWE-400US
04

affected products (33)

Products and version ranges known to be affected.

showing 20 of 33
05

advisories (1)

Vendor and ecosystem advisories describing this.

  • RHSA-2021:1924Red Hat Security Advisory: spice security update2021-05-18csaf · redhat_csafUS

    An update for spice is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bdunvdredhat_csafNVDCVE.orgMITRE
published 2021-05-28modified 2026-06-17
08

references (20)

External citations — patches, advisories, analysis.

scry

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