Medium [CVE-2026-68516] Denial of service via crafted HTJ2K-compressed EXR with invalid image-offset
This medium-severity Red Hat Linux advisory covers CVE-2026-68516.
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Summary
A flaw was found in OpenEXR. A remote attacker could provide a specially crafted HTJ2K-compressed EXR image file.
When OpenEXR processes this file with JPEG 2000 SIZ fields that place the first tile outside the visible image, it can lead to invalid tile and codeblock geometry. This results in a stack out-of-bounds write, causing a denial of service.
This vulnerability only affects OpenEXR versions 3.4.0 through 3.4.13, which include HTJ2K compression support. No Red Hat products or Fedora community distributions ship a version within this range.
Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-787.
Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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