Description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.1.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to an out-of-bounds write. When a crafted B44-compressed scanline EXR causes the logical scratch size to truncate before allocation and uncompress_b44_impl() writes using the attacker-controlled channel width, allowing denial of service and memory corruption. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
References5
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.…
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.…
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.…
- github.com/AcademySoftwareFoundation/openexr/security/advisorie…
- github.com/AcademySoftwareFoundation/openexr/security/advisorie…
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 9 November 2026
- CWE
- CWE-787
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.