CVE-2026-55371

openexr: OpenEXR: Denial of Service via NULL pointer dereference in exr_attr_set_bytes()

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 25, 2026

Updated · August 26, 2026

Description

A flaw was found in OpenEXR. A vulnerability in the exr_attr_set_bytes() function allows an attacker to trigger a NULL pointer dereference by providing a positive hint_length with a NULL type_hint. This can lead to a deterministic crash, resulting in a denial of service (DoS), which makes the affected system or application unavailable.

Statement

This vulnerability only affects OpenEXR versions 3.4.0 through 3.4.12. No Red Hat products or Fedora community distributions ship a version within this range.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference