CVE-2026-26981 (GCVE-0-2026-26981)
Vulnerability from cvelistv5
Published
2026-02-24 02:26
Modified
2026-02-24 20:03
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
  • CWE-195 - Signed to Unsigned Conversion Error
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.
References
Impacted products
Vendor Product Version
AcademySoftwareFoundation openexr Version: >= 3.3.0, < 3.3.7
Version: >= 3.4.0, < 3.4.5
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