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CVE-2021-3476
A flaw was found in OpenEXR's B44 uncompression functionality in versions before 3.0.0-beta. An attacker who is able to submit a crafted…
Medium5.3EPSS 1.8%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A flaw was found in OpenEXR's B44 uncompression functionality in versions before 3.0.0-beta. An attacker who is able to submit a crafted file to OpenEXR could trigger shift overflows, potentially affecting application availability.
Timeline
ID reserved
By redhat
- 1 day later
· 1 day later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 1.8% · top 21% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
OpenEXR
- affected OpenEXR 3.0.0-beta
References (5)
- https://bugzilla.redhat.com/show_bug.cgi?id=1939145 (opens in a new tab)x_transferred
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24787 (opens in a new tab)x_transferred
- [debian-lts-announce] 20210703 [SECURITY] [DLA 2701-1] openexr security update (opens in a new tab)mailing-listx_transferred
- GLSA-202107-27 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20221211 [SECURITY] [DLA 3236-1] openexr security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3476)Record last updated .