CVE-2026-68516
Publication date 25 August 2026
Last updated 26 August 2026
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| openexr | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.5 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-68516
- https://github.com/academysoftwarefoundation/openexr/commit/45521f92104373b5c850f27f2d4659ab6759e848
- https://github.com/academysoftwarefoundation/openexr/commit/85009d840cc085aa96ad03ae76fa6463defeb0e5
- https://github.com/academysoftwarefoundation/openexr/security/advisories/ghsa-fw66-6xph-56jm
- https://github.com/cveproject/cvelistv5/tree/main/cves/2026/68xxx/cve-2026-68516.json