CVE-2026-68516 - OpenEXR: HTJ2K SIZ image-offset gap stack buffer overflow

CVE-2026-68516 - OpenEXR: HTJ2K SIZ image-offset gap stack buffer overflow

https://cvefeed.io/rssfeed/latest.atom / Tue, 08/25/2026 - 04:28
CVE ID :CVE-2026-68516
Published : Aug. 24, 2026, 10:17 p.m. | 2 hours, 11 minutes ago
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.
Severity: 6.5 | MEDIUM
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