Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/AcademySoftwareFoundation/openexr/commit/45521f92104373b5c850
- https://github.com/AcademySoftwareFoundation/openexr/commit/85009d840cc085aa96ad
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fw
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fw
FAQ
What is CVE-2026-68516?
CVE-2026-68516 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 cr...
How severe is CVE-2026-68516?
CVE-2026-68516 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-68516?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.