CVE-2020-11864: libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows denial of service (issue 2 of 2).

Q: How do I fix CVE-2020-11864?

libemf: upgrade to newer than 1.0.11; fedora: mitigate or apply the listed mitigation; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2020-11864 being exploited?

CVE-2020-11864 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-11864 affect?

CVE-2020-11864 affects libemf, fedora, leap. Severity is medium (CVSS 5.5). libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows denial of service (issue 2 of 2).

Q: How urgent is CVE-2020-11864?

Priority 37/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADEMITIGATEMITIGATE

CVE-2020-11864 is a medium-severity flaw (CVSS 5.5) affecting libemf, fedora, leap. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows denial of service (issue 2 of 2).

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Published	2020-05-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: fedoraproject · libemf project · opensuse

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

Am I affected?

Timeline

2020-05-11 16:15 UTCPublished CVE record published
2026-06-17 02:50 UTCUpdated Record last modified

libemf project libemf UPGRADE

Affected: <= 1.0.11

Fixed in: newer than 1.0.11

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 1.0.11 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libemf

Note

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

fedoraproject fedora MITIGATE

Affected: 31

Fixed in: no fixed release known

Safe to downgrade to: a release before 31

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.

opensuse leap MITIGATE

Affected: 15.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 15.1

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-2020-11864?

libemf: upgrade to newer than 1.0.11; fedora: mitigate or apply the listed mitigation; leap: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-11864 being exploited?

CVE-2020-11864 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-2020-11864 affect?

CVE-2020-11864 affects libemf, fedora, leap. Severity is medium (CVSS 5.5). libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows denial of service (issue 2 of 2).

How urgent is CVE-2020-11864?

Priority 37/100. No elevated risk signals yet.

Related CVEs

CVE-2020-13999 MEDIUM 5.5 UPGRADE MITIGATE ScaleViewPortExtEx in libemf.cpp in libEMF (aka ECMA-234 Metafile Library) 1.0.12 allows an integer overflow a
CVE-2020-11866 HIGH 7.8 UPGRADE MITIGATE libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows a use-after-free.
CVE-2020-11865 HIGH 7.8 UPGRADE MITIGATE libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows out-of-bounds memory access.
CVE-2020-11863 MEDIUM 5.5 UPGRADE MITIGATE libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows denial of service (issue 1 of 2).

References

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