CVE-2026-68516

Summary

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.

Affected Software

VendorProductVersion RangeStatus
AcademySoftwareFoundationopenexr>= 3.4.0, < 3.4.14affected

Weaknesses

  • CWE-787: CWE-787: Out-of-bounds Write
  • CWE-121: CWE-121: Stack-based Buffer Overflow

References