CVE-2026-26981 - OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp

CVE-2026-26981 - OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp

https://cvefeed.io/rssfeed/latest.atom / Tue, 02/24/2026 - 08:03
CVE ID : CVE-2026-26981
Published : Feb. 24, 2026, 3:16 a.m. | 3 hours, 8 minutes ago
Description : 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
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