CVE-2025-48071 OpenEXR's Forged Unpacked Size can Lead to Heap-Based Buffer Overflow in Deep Scanline Parsing
A heap-based buffer overflow in OpenEXR allows attackers to execute arbitrary code or cause denial of service via maliciously crafted EXR files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-48071?
CVE-2025-48071 is a high-severity memory corruption vulnerability in Openexr Openexr, published on 31 Jul 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.2 through 3.3.0, there is a heap-based buffer overflow during a write operation when decompressing ZIPS-packed deep scan-line EXR files with a maliciously forged chunk header. This is fixed in version 3.3.3.
Weakness: CWE-122
Which versions are affected by CVE-2025-48071?
3 open source packages ship an affected version, including openexr and OpenEXR. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
openexr PyPI | From 3.3.0 | 3.3.3 |
openexr PyPI | From 3.3.0 | 3.3.3 |
OpenEXR PyPI | From 3.3.0 | 3.3.3 |
Products include Openexr Openexr.
How do I fix CVE-2025-48071?
Upgrade openexr to 3.3.3 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-48071 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-48071 exists.
Other vulnerabilities in Openexr Openexr
- CVE-2023-5841 OpenEXR Heap Overflow in Scanline Deep Data Parsing
- CVE-2026-41142 OpenEXR is Vulnerable to Integer overflow in ImageChannel::resize leads to heap OOB write via OpenEXRUtil public API
- CVE-2026-42216 OpenEXR: Out-of-bounds read in `IDManifest::init()` during prefix expansion
- CVE-2017-9111 OpenEXR invalid write
- CVE-2017-9113 Memory corruption in n/a
Sources
Also known as GHSA-h45x-qhg2-q375, PYSEC-2026-1747.