OpenEXR 2.3.0 has a memory leak in ThreadPool in IlmBase/IlmThread/IlmThreadPool.cpp, as demonstrated by exrmultiview.

published 2018-10-17 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10171

cvss: 4.3; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

Patch / fix

distros 2 links 1

debian opensuse

openexr Debian 14, Debian 13, Debian 12 2.5.3-2

debian advisories DEBIAN-CVE-2018-18443

openexr openSUSE Tumbleweed 3.1.1-2.2

opensuse advisories openSUSE-SU-2024:11117-1

github.com/openexr/openexr/releases/tag/v2.4.0 release

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-2018-18443 updated 2026-11-06 cvss 3.3

OpenEXR: Memory leak in ThreadPool in in IlmBase/IlmThread/IlmThreadPool.cpp

Red Hat Enterprise Linux 8 OpenEXR, OpenEXR-libs
affected: no fix available “Fix deferred”
Red Hat Enterprise Linux 6 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 7 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 9 OpenEXR
not affected: vulnerable code not present

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

2.11% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/openexr/openexr/issues/350 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	4.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-772 Missing Release of Resource after Effective Lifetime

References

github.com /openexr/openexr/issues/350
exploit, third-party-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/IZN7WUH3SR6DSRODRB4SLFTBKP74FVC5/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/5E2OZU4ZSF5W4ODBU4L547HX5A4WOBFV/
vendor-advisory
github.com /openexr/openexr/releases/tag/v2.4.0

Sources

CVE List CVE-2018-18443
NVD CVE-2018-18443

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.

Summary