High [CVE-2026-87823] Denial of Service or Information Disclosure via out-of-bounds read
This high-severity Red Hat Linux advisory covers CVE-2026-87823 affecting Red Hat Ceph Storage 9.
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Summary
A flaw was found in zstd-jni. This vulnerability arises from insufficient bounds checks in direct-ByteBuffer frame-size native methods, which allows attackers to provide negative or overflowing offsets.
A remote attacker can exploit this by supplying specially crafted negative offset values, leading to out-of-bounds memory reads. This can result in the termination of the Java Virtual Machine (JVM), causing a Denial of Service (DoS), or the disclosure of sensitive information by extracting arbitrary frame size data from unintended memory locations.
An attacker who can provide crafted input with negative or overflowing offsets may cause the JVM to terminate or disclose data from unintended memory locations. Red Hat severity: Important — CVSS 8.2 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).
Weakness: CWE-125. Affected Red Hat products: Red Hat Ceph Storage 9.
Red Hat lists Exploit Intelligence; OpenShift Developer Tools and Services; Red Hat build of Apache Camel 4 for Quarkus 3; Red Hat build of Apache Camel for Spring Boot 4; Red Hat build of Apicurio Registry 3; Red Hat build of Debezium 3; Red Hat build of Quarkus; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Fuse 7; Red Hat Hardened Images; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack; Red Hat OpenShift AI (RHOAI) as not affected.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 1.5.7-14
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Update zstd-jni to version 1.5.7-14 or later. If an update is not immediately possible, do not pass attacker-controlled buffers or offsets to the affected frame-size methods. Validate offsets and lengths before invoking zstd-jni native methods.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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