Vulnerability · Published Sep 24, 2026 · Assigned by mitre
CVE-2026-88384
Medium 5.5
In plain English
A medium-severity null pointer dereference in the openexr package (Debian). 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 3.4.14 contains a NULL Pointer Dereference in the C++ attribute parsing path. A specially crafted EXR file containing an unknown-type attribute with dataSize set to zero causes the parser to create an opaque attribute with a NULL packed_data pointer. The OpaqueAttribute constructor passes the NULL pointer to memcpy() without validating the zero-size condition, resulting in undefined behavior and process termination, leading to denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | openexr | no fix listed | DEBIAN-CVE-2026-88384 |
| Debian:13 | openexr | no fix listed | DEBIAN-CVE-2026-88384 |
| Debian:14 | openexr | 3.4.16+ds-1 | DEBIAN-CVE-2026-88384 |
| Ubuntu:26.10 | openexr | no fix listed | UBUNTU-CVE-2026-88384 |
Affected products (as reported)
Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H