Vulnerability in luben zstd-jni

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three direct-ByteBuffer frame-size native methods, allowing out-of-bounds memory reads via negative or overflowing offsets. Attackers can supply negative offset values near Integer.MIN_VALUE to read unmapped memory, causing JVM termination or extracting arbitrary frame size data from unintended memory locations.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR16 Oct 2026CERTFR-2026-AVI-1336

  Multiple vulnerabilities in IBM products Translated from French

  Multiple vulnerabilities have been discovered in IBM products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.

  CVE-2026-14671CVE-2026-11548CVE-2022-22950+490 more CVEs
• BSI CERT-Bund6 Oct 2026WID-SEC-2026-3791

  IBM SPSS: Multiple vulnerabilities Translated from German

  Risk highCVE-2026-87795CVE-2026-87824CVE-2026-73334+7 more CVEs

[ References ]References

• github.com/luben/zstd-jni/security/advisories/GHSA-jfr6-9xqw-2g2qvendor-advisory
• github.com/luben/zstd-jni/commit/d7a1c99322d5e1fc71932e722c0b5bb2fc525d3fpatch
• github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/native/jni_zstd.ctechnical-description
• github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/Zstd.javatechnical-description
• github.com/luben/zstd-jni/releases/tag/v1.5.7-14release-notes
• github.com/luben/zstd-jni/commit/46dcb2a54c8b8f2ce2cad7187a7513f509c533actechnical-descriptionpatch
• github.com/luben/zstd-jniproduct
• www.vulncheck.com/advisories/zstd-jni-1.1.1-through-1.5.7-13-out-of-bounds-read-via-dir…third-party-advisory