Reject oversized channelstore allocations in exrmultipart convert#2541
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cary-ilm merged 2 commits intoJul 14, 2026
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The convert path computed pixel_count as int64_t but passed samplesize * pixel_count to std::vector::resize(size_type), which truncates on ILP32 and left readPixels() writing past the buffer. Validate the size fits in size_t before resizing channelstore. Addresses https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-r24r-74rc-588f Signed-off-by: Cary Phillips <cary@ilm.com> Co-authored-by: Cursor <cursoragent@cursor.com>
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The convert path computed pixel_count as int64_t but passed samplesize * pixel_count to std::vector::resize(size_type), which truncates on ILP32 and left readPixels() writing past the buffer.
Validate the size fits in size_t before resizing channelstore.
Addresses https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-r24r-74rc-588f