Vulnerability · Published Aug 25, 2026 · Assigned by GitHub_M
CVE-2026-68515OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union
High 7.1
In plain English
A high-severity heap buffer overflow in openexr from AcademySoftwareFoundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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, exrmultiview can write past a heap allocation when it combines two attacker-supplied, individually valid scanline EXR files whose union dataWindow is not aligned to one view's channel subsampling. The utility allocates sampled channel storage using a truncated union_width / xSampling, then reads the sampled input through a Slice based on the misaligned union window, producing a heap out-of-bounds write. The trigger is normal public-tool processing, such as exrmultiview left A.exr right B.exr out.exr with crafted but valid inputs, so this is not solely an API or caller-precondition issue. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | OpenEXR-devel | 2.2.0-12.el8_10.3 | ALSA-2026:82345 |
| AlmaLinux:8 | OpenEXR-libs | 2.2.0-12.el8_10.3 | ALSA-2026:82345 |
| AlmaLinux:10 | openexr | 3.1.10-8.el10_2.4 | ALSA-2026:69609 |
| AlmaLinux:9 | openexr | 3.1.1-3.el9_8.4 | ALSA-2026:69608 |
| AlmaLinux:10 | openexr-devel | 3.1.10-8.el10_2.4 | ALSA-2026:69609 |
| AlmaLinux:9 | openexr-devel | 3.1.1-3.el9_8.4 | ALSA-2026:69608 |
| AlmaLinux:10 | openexr-libs | 3.1.10-8.el10_2.4 | ALSA-2026:69609 |
| AlmaLinux:9 | openexr-libs | 3.1.1-3.el9_8.4 | ALSA-2026:69608 |
| Debian:12 | openexr | no fix listed | DEBIAN-CVE-2026-68515 |
| Debian:13 | openexr | no fix listed | DEBIAN-CVE-2026-68515 |
| Debian:14 | openexr | 3.4.14-0.1 | DEBIAN-CVE-2026-68515 |
| Rocky Linux:8 | OpenEXR | 0:2.2.0-12.el8_10.3 | RLSA-2026:82345 |
| Rocky Linux:10 | openexr | 0:3.1.10-8.el10_2.4 | RLSA-2026:69609 |
| Rocky Linux:9 | openexr | 0:3.1.1-3.el9_8.4 | RLSA-2026:69608 |
| Ubuntu:26.10 | openexr | no fix listed | UBUNTU-CVE-2026-68515 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AcademySoftwareFoundation | openexr | >= 3.3.0, < 3.3.13>= 3.4.0, < 3.4.14< 3.2.11 |
Weakness: CWE-122, CWE-787 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
References
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-gjf7-wjjw-xq56 x_refsource_CONFIRM
- https://github.com/AcademySoftwareFoundation/openexr/commit/77ee19c021398b1c56f32c3af8347e365dbd4f33 x_refsource_MISC
- https://github.com/AcademySoftwareFoundation/openexr/commit/c644ac2dfeac82939c81a8551d6f4b7859f63add x_refsource_MISC
- https://github.com/AcademySoftwareFoundation/openexr/commit/e2300a3d54a93d20a36a86b82f3a506c4c91476f x_refsource_MISC