AcademySoftwareFoundation OpenEXR up to 3.2.5/3.3.7/3.4.5 EXR File Parser readPixels out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability has been found in AcademySoftwareFoundation OpenEXR up to 3.2.5/3.3.7/3.4.5 and classified as critical. Affected by this vulnerability is the function CompositeDeepScanLine::readPixels of the component EXR File Parser. Performing a manipulation results in out-of-bounds write. This vulnerability is known as CVE-2026-27622. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in AcademySoftwareFoundation OpenEXR up to 3.2.5/3.3.7/3.4.5. This affects the function CompositeDeepScanLine::readPixels of the component EXR File Parser. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In CompositeDeepScanLine::readPixels, per-pixel totals are accumulated in vector<unsigned int> total_sizes for attacker-controlled large counts across many parts, total_sizes[ptr] wraps modulo 2^32. overall_sample_count is then derived from wrapped totals and used in samples[channel].resize(overall_sample_count). Decode pointer setup/consumption proceeds with true sample counts, and write operations in core unpack (generic_unpack_deep_pointers) overrun the undersized composite sample buffer. This vulnerability is fixed in v3.2.6, v3.3.8, and v3.4.6.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-27622 since 02/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 301138 (Python Library OpenEXR 2.3.x / 3.x < 3.2.6 / 3.3.x < 3.3.8 / 3.4.x < 3.4.6 Heap Buffer Overflow), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.2.6, 3.3.8 or 3.4.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (301138) and CERT Bund (WID-SEC-2026-1053). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Red Hat Enterprise Linux
  • Oracle Linux
  • RESF Rocky Linux

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 301138
Nessus Name: Python Library OpenEXR 2.3.x / 3.x < 3.2.6 / 3.3.x < 3.3.8 / 3.4.x < 3.4.6 Heap Buffer Overflow

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenEXR 3.2.6/3.3.8/3.4.6

Timelineinfo

02/20/2026 CVE reserved
03/04/2026 +12 days Advisory disclosed
03/04/2026 +0 days VulDB entry created
07/01/2026 +119 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-cr4v-6jm6-4963
Status: Confirmed

CVE: CVE-2026-27622 (🔒)
GCVE (CVE): GCVE-0-2026-27622
GCVE (VulDB): GCVE-100-348645
CERT Bund: WID-SEC-2026-1053 - Red Hat Enterprise Linux (openexr): Schwachstelle erm&ouml;glicht Codeausf&uuml;hrung und Dos

Entryinfo

Created: 03/04/2026 04:38
Updated: 07/01/2026 18:12
Changes: 03/04/2026 04:38 (69), 03/05/2026 00:07 (1), 03/06/2026 04:07 (11), 03/07/2026 18:39 (2), 04/13/2026 22:00 (7), 04/20/2026 14:00 (1), 07/01/2026 18:12 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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