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Fencer Vulns
high 7.8

CVE-2020-11866 json

libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows a use-after-free.

published 2020-05-11 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-4206

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 71%
public exploits
0
none known

Summary

libEMF (aka ECMA-234 Metafile Library) through 1.0.11 allows a use-after-free.

Patch / fix

  • libemf Debian 14, Debian 13, Debian 12 1.0.12-1

debian advisories DEBIAN-CVE-2020-11866

  • libEMF SLE Workstation Extension 15 SP2, SLE Workstation Extension 15 SP1 1.0.7-3.3.1
  • libEMF SLE Workstation Extension 12 SP5, SLE Workstation Extension 12 SP4, SLE Software Development Kit 12 SP5 +1 more 1.0.7-11.3.1

suse advisories SUSE-SU-2020:1621-2SUSE-SU-2020:1622-1SUSE-SU-2020:1621-1

  • libEMF openSUSE Leap 15.1 1.0.7-lp151.3.3.1

opensuse advisories openSUSE-SU-2020:0831-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-11866 updated cvss 7.8

libEMF: allows a use-after-free

  • Red Hat Enterprise Linux 6 libEMF
    affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.35% chance of exploitation in the next 30 days, higher than 71% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.