Medium [CVE-2026-54920] Denial of Service via crafted HTJ2K-compressed EXR file
This medium-severity Red Hat Linux advisory covers CVE-2026-54920.
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Summary
A flaw was found in OpenEXR. A remote attacker could exploit a reachable assertion failure in the HTJ2K decode path by providing a specially crafted HTJ2K-compressed EXR file.
This file, containing a QCD marker with specific invalid bits, causes an unconditional process abort in applications that read untrusted input, leading to a Denial of Service (DoS). This vulnerability only affects OpenEXR versions 3.4.0 through 3.4.12, 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-617. 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 1 hour 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 1 hour 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 1 hour ago·verify at source
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