CVE-2026-26981 (GCVE-0-2026-26981)

Vulnerability from cvelistv5 – Published: 2026-02-24 02:26 – Updated: 2026-02-24 20:03
VLAI
Title
OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp
Summary
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive length being passed to `memcpy`. Versions 3.3.7 and 3.4.5 contain a patch.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 19:50 UTC
CWE
  • CWE-195 - Signed to Unsigned Conversion Error
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7926 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
AcademySoftwareFoundation openexr Affected: >= 3.3.0, < 3.3.7
Affected: >= 3.4.0, < 3.4.5
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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