Vulnerability · Published Sep 10, 2026 · Assigned by VulnCheck
CVE-2026-89046zstd-jni 1.5.5-6 through 1.5.7-13 Out-of-Bounds Read via Negative Offset
High 8.2
In plain English
A high-severity out-of-bounds read in zstd-jni from luben. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
zstd-jni versions 1.5.5-6 through 1.5.7-13 contain an out-of-bounds read vulnerability in Zstd.getFrameContentSize that fails to validate negative srcPosition arguments. Attackers can supply negative offset values that bypass bounds checks and reach the native frame-header parser, causing out-of-bounds memory reads that lead to information disclosure or JVM crashes.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zstd-jni-java | no fix listed | DEBIAN-CVE-2026-89046 |
| Debian:13 | zstd-jni-java | no fix listed | DEBIAN-CVE-2026-89046 |
| Debian:14 | zstd-jni-java | 1.5.7-23+ds-1 | DEBIAN-CVE-2026-89046 |
| Ubuntu:24.04:LTS | zstd-jni-java | no fix listed | UBUNTU-CVE-2026-89046 |
| Ubuntu:26.04:LTS | zstd-jni-java | no fix listed | UBUNTU-CVE-2026-89046 |
| Ubuntu:26.10 | zstd-jni-java | no fix listed | UBUNTU-CVE-2026-89046 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
References
- GitHub Security Advisory (GHSA-rm53-6wf5-f34m) vendor-advisory
- Fix commit: reject a negative source position and size patch
- Upper-bound-only bounds check at v1.5.7-13 technical-description
- Native routine that offsets the critical array pointer without re-validating technical-description
- zstd-jni v1.5.7-14 Release Notes release-notes
- luben/zstd-jni product
- VulnCheck Advisory: zstd-jni 1.5.5-6 through 1.5.7-13 Out-of-Bounds Read via Negative Offset third-party-advisory