CVE-2026-87825

A flaw was found in zstd-jni. This use-after-free vulnerability occurs because streams and contexts only hold a dictionary's shared lock during the load call, allowing the dictionary to be closed while still being referenced. A remote attacker could exploit this by closing a dictionary after associating it with a stream or context. Subsequent read or write operations would then access freed native memory, leading to silent data corruption or a Java Virtual Machine (JVM) crash, resulting in a denial of service.

This is an Important flaw in zstd-jni that could lead to silent data corruption or JVM crashes due to a use-after-free vulnerability. The flaw arises when a dictionary is prematurely closed while still actively referenced by compression or decompression streams, potentially impacting Red Hat products that utilize zstd-jni for data handling.

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 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.