What is CVE-2021-20299?

CVE-2021-20299 is a high-severity vulnerability in Openexr, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2022-03-16.

How severe is CVE-2021-20299?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Openexr

CVE-2021-20299

A flaw was found in OpenEXR's Multipart input file functionality. A crafted multi-part input file with no actual parts can trigger a NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Published 2022-03-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.018 (77.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000

Affected products

Openexr
Debian Linux — versions 10.0
Openexr — versions Affected before v2.5.4

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

bugs.chromium.org/p/oss-fuzz/issues/detail (Patch, Mailing List, Third Party Advisory)
github.com/AcademySoftwareFoundation/openexr/commit/25e9515b06a6bc293d871622b8c… (Patch, Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
lists.debian.org/debian-lts-announce/2022/12/msg00022.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-20299?: CVE-2021-20299 is a high-severity vulnerability in Openexr, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2022-03-16.
How severe is CVE-2021-20299?: High severity. CVSS v3 base score is 7.5 out of 10.