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CVE-2021-3478

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An...

5.5 MediumFix available

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.96%Up 0.3 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.5

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
CVE-2021-3478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-400, CWE-770
Updated
2026-11-02
CVE List No score

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
CVE-2021-3478
Weakness
CWE-400
Updated
2026-11-02
EUVDEUVD-2021-26800 No score

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
EUVD-2021-26800
Updated
2026-11-03
GitHub AdvisoriesGHSA-fwcc-9735-qjcm 5.5

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An...

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
GHSA-fwcc-9735-qjcm
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-400, CWE-770
Updated
2026-11-02
OSVALPINE-CVE-2021-3478 5.5

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
ALPINE-CVE-2021-3478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 5.5

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
CVE-2021-3478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVDEBIAN-CVE-2021-3478 5.5

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
DEBIAN-CVE-2021-3478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-3478 5.5

There's a flaw in OpenEXR's scanline input file functionality in versions before 3.0.0-beta. An attacker able to submit a crafted file to be processed by OpenEXR could consume excessive system memory. The greatest impact of this flaw is to system availability.

Record
UBUNTU-CVE-2021-3478
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2021-0326 No score

Updated openexr packages fix security vulnerabilities

Updated openexr packages fix security vulnerabilities:

It was discovered that OpenEXR incorrectly handled certain malformed EXR image files. If a user were tricked into opening a crafted EXR image file, a remote attacker could cause a denial of service, or possibly execute arbitrary code (CVE-2021-3474, CVE-2021-3475, CVE-2021-3476, CVE-2021-3477, CVE-2021-3478, CVE-2021-3479, CVE-2021-3598, CVE-2021-3605, CVE-2021-20296, CVE-2021-23169, CVE-2021-23215, CVE-2021-26260).

Record
MGASA-2021-0326
Updated
2026-11-02
OSVUSN-4900-1 No score

openexr vulnerabilities

It was discovered that OpenEXR incorrectly handled certain malformed EXR image files. If a user were tricked into opening a crafted EXR image file, a remote attacker could cause a denial of service, or possibly execute arbitrary code.

Record
USN-4900-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openexr
Alpine:v3.13
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.14
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.15
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.16
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.17
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.18
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.19
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.20
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.21
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.22
 2.5.0 up to 2.5.4-r0
2.5.4-r0
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Affected packages
PackageAffectedFixed
openexr
Alpine:v3.23
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Alpine:v3.24
 2.5.0 up to 2.5.4-r0
2.5.4-r0
openexr
Debian:12
 before 2.5.4-1
2.5.4-1
openexr
Debian:13
 before 2.5.4-1
2.5.4-1
openexr
Debian:14
 before 2.5.4-1
2.5.4-1
openexr
Debian:9
From an advisory covering 11 CVEs
 before 2.2.0-11+deb9u3, plus listed versions
2.2.0-112.2.0-11+deb9u12.2.0-11+deb9u2
2.2.0-11+deb9u3
openexr
Debian:10
From an advisory covering 22 CVEs
 before 2.2.1-4.1+deb10u2, plus listed versions
2.2.1-4.12.2.1-4.1+deb10u1
2.2.1-4.1+deb10u2
openexr
Mageia:7
From an advisory covering 12 CVEs
 before 2.3.0-2.4.mga7
2.3.0-2.4.mga7
openexr
Mageia:8
From an advisory covering 12 CVEs
 before 2.5.7-1.mga8
2.5.7-1.mga8
openexr
Ubuntu:16.04:LTS
 before 2.2.0-10ubuntu2.6, plus listed versions
2.2.0-1ubuntu32.2.0-7ubuntu12.2.0-9ubuntu12.2.0-10ubuntu22.2.0-10ubuntu2.12.2.0-10ubuntu2.22.2.0-10ubuntu2.32.2.0-10ubuntu2.4
2.2.0-10ubuntu2.6
openexr
Ubuntu:18.04:LTS
 before 2.2.0-11.1ubuntu1.6, plus listed versions
2.2.0-11ubuntu12.2.0-11.1ubuntu12.2.0-11.1ubuntu1.12.2.0-11.1ubuntu1.22.2.0-11.1ubuntu1.32.2.0-11.1ubuntu1.4
2.2.0-11.1ubuntu1.6
openexr
Ubuntu:20.04:LTS
 before 2.3.0-6ubuntu0.5, plus listed versions
2.2.1-4.1ubuntu12.3.0-62.3.0-6build12.3.0-6ubuntu0.12.3.0-6ubuntu0.22.3.0-6ubuntu0.3
2.3.0-6ubuntu0.5
openexr
Ubuntu:16.04:LTS
From an advisory covering 6 CVEs
 before 2.2.0-10ubuntu2.6, plus listed versions
2.2.0-1ubuntu32.2.0-7ubuntu12.2.0-9ubuntu12.2.0-10ubuntu22.2.0-10ubuntu2.12.2.0-10ubuntu2.22.2.0-10ubuntu2.32.2.0-10ubuntu2.4
2.2.0-10ubuntu2.6
openexr
Ubuntu:18.04:LTS
From an advisory covering 6 CVEs
 before 2.2.0-11.1ubuntu1.6, plus listed versions
2.2.0-11ubuntu12.2.0-11.1ubuntu12.2.0-11.1ubuntu1.12.2.0-11.1ubuntu1.22.2.0-11.1ubuntu1.32.2.0-11.1ubuntu1.4
2.2.0-11.1ubuntu1.6
openexr
Ubuntu:20.04:LTS
From an advisory covering 6 CVEs
 before 2.3.0-6ubuntu0.5, plus listed versions
2.2.1-4.1ubuntu12.3.0-62.3.0-6build12.3.0-6ubuntu0.12.3.0-6ubuntu0.22.3.0-6ubuntu0.3
2.3.0-6ubuntu0.5

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
aliases, productsEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3478 is a medium vulnerability (CVSS 5.5) in Academysoftwarefoundation Openexr, published March 31, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.96%, the 61st percentile. Fixed in openexr 2.5.4-r0.

References

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