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CVE-2026-32778

libexpat: libexpat: Denial of Service via NULL pointer dereference after out-of-memory condition

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Severity

Moderate

Red Hat Product Security

5.1

CVSS 3.1

Review impact separately from score.

Published · March 16, 2026

Updated · July 3, 2026

Description

A flaw was found in libexpat. This vulnerability allows an attacker to trigger a NULL pointer dereference in the setContext function. This occurs when the system attempts to retry an operation after an out-of-memory condition, which can lead to a Denial of Service (DoS) for the affected application.

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

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

CVSS / CWE

CVSS 3.1 · 5.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-476 · NULL Pointer Dereference