CVE-2025-48074 OpenEXR's Unbounded File Header Values can Lead to Out-Of-Memory Errors
Attackers can cause out-of-memory errors and performance degradation by providing malicious EXR files with unvalidated header values.
- 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-2025-48074?
CVE-2025-48074 is a medium-severity denial of service vulnerability in Openexr Openexr, published on 1 Aug 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 version 3.3.2, applications trust unvalidated dataWindow size values from file headers, which can lead to excessive memory allocation and performance degradation when processing malicious files. This is fixed in version 3.3.3.
Weakness: CWE-770
Which versions are affected by CVE-2025-48074?
3 open source packages ship an affected version, including openexr and OpenEXR. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
openexr PyPI | From 3.3.2 | 3.3.3 |
openexr PyPI | From 3.3.2 | 3.3.3 |
OpenEXR PyPI | From 3.3.2 | 3.3.3 |
Products include Openexr Openexr.
How do I fix CVE-2025-48074?
Upgrade openexr to 3.3.3 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-48074 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-48074 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 DEBIAN-CVE-2025-48074, GHSA-x22w-82jp-8rvf, PYSEC-2026-1749, ROOT-OS-DEBIAN-11-CVE-2025-48074, ROOT-OS-DEBIAN-12-CVE-2025-48074, ROOT-OS-DEBIAN-13-CVE-2025-48074.