Bug 2523170 (CVE-2026-68516) - CVE-2026-68516 OpenEXR: OpenEXR: Denial of service via crafted HTJ2K-compressed EXR with invalid image-offset
Summary: CVE-2026-68516 OpenEXR: OpenEXR: Denial of service via crafted HTJ2K-compress...
Keywords:
Status: NEW
Alias: CVE-2026-68516
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-24 22:21 UTC by OSIDB Bzimport
Modified: 2026-08-25 16:05 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-24 22:21:18 UTC
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.


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