CVE-2019-3813: 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

This month

HIGH 7.5WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2019-3813 is a high-severity flaw (CVSS 7.5) affecting spice, enterprise linux desktop, enterprise linux server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 memslot_get_virt. This may lead to a denial of service, or, in the worst case, code-execution by unauthenticated attackers.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-193
Published	2019-02-04
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: redhat · spice project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-02-04 18:29 UTCPublished CVE record published
2026-06-17 02:35 UTCUpdated Record last modified

spice project spice UPGRADE

Affected: >= 0.5.2 and <= 0.14.1

Fixed in: newer than 0.14.1

Safe to downgrade to: a release before 0.5.2

1. Check installed version

apt-cache policy spice || rpm -q spice || spice --version

2. UPGRADE to newer than 0.14.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade spice

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade spice

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.5.2 (Debian / Ubuntu)

apt-cache madison spice sudo apt install spice=<VERSION_BEFORE_0.5.2> sudo apt-mark hold spice

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spice sudo dnf downgrade spice-<VERSION_BEFORE_0.5.2> sudo dnf versionlock add spice

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

redhat enterprise linux desktop MITIGATE

Affected: 6.0 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux server MITIGATE

Affected: 6.0 · 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux server aus MITIGATE

Affected: 7.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux server eus MITIGATE

Affected: 7.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux server tus MITIGATE

Affected: 7.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2019-3813?

spice: upgrade to newer than 0.14.1; enterprise linux desktop: mitigate or apply the listed mitigation; enterprise linux server: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-3813 being exploited?

CVE-2019-3813 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-2019-3813 affect?

CVE-2019-3813 affects spice, enterprise linux desktop, enterprise linux server. Severity is high (CVSS 7.5). 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 memslot_get_virt. This may lead to a denial of service, or, in the worst case, code-execution by unauthenticated attackers.

How urgent is CVE-2019-3813?

Priority 48/100. High severity; On your watchlist

Related CVEs

CVE-2021-20201 MEDIUM 5.3 UPGRADE MITIGATE A flaw was found in spice in versions before 0.14.92
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-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

References

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