CVE-2026-59186

openexr: OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture...

CVE-2026-59186 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-59186, released August 28, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.1
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D<Rgba> tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

Where it's fixed

ProductFixed inFixReleased
Linux
OpenEXR · rocky 8 0:2.2.0-12.el8_10.3 RLSA-2026:82345 Nov 7, 2026
OpenEXR-devel · RHEL 8 0:2.2.0-12.el8_10.3 RHSA-2026:82345 Oct 16, 2026
OpenEXR-devel · almalinux 8 2.2.0-12.el8_10.3 ALSA-2026:82345 Nov 7, 2026
OpenEXR-devel · ol 8 0:2.2.0-12.el8_10.3 ELSA-2026-82345 Nov 7, 2026
OpenEXR-libs · RHEL 8 0:2.2.0-12.el8_10.3 RHSA-2026:82345 Oct 16, 2026
OpenEXR-libs · almalinux 8 2.2.0-12.el8_10.3 ALSA-2026:82345 Nov 7, 2026
OpenEXR-libs · ol 8 0:2.2.0-12.el8_10.3 ELSA-2026-82345 Nov 7, 2026
openexr · Debian 14 3.4.14-0.1 DEBIAN-CVE-2026-59186 Aug 28, 2026
openexr · opensuse-leap 16.0 3.2.2-160000.10.1 OPENSUSE-SU-2026:21737-1 Sep 2, 2026
openexr · sles 15.6 2.2.1-150000.3.55.1 SUSE-SU-2026:4003-1 Sep 7, 2026
openexr · sles 15.7 2.2.1-150000.3.55.1 SUSE-SU-2026:4003-1 Sep 7, 2026
openexr · sles 16.0 3.2.2-160000.10.1 SUSE-SU-2026:23604-1 Sep 2, 2026

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