---
cve: "CVE-2026-87825"
severity: "HIGH"
cvss: 7.0
epss: "0.1%"
vendor: "luben"
kev: false
exploited: false
published: "2026-09-09 14:32:44"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T10:44:16+02:00"
---

# CVE-2026-87825

> 7.0 HIGH · 🧪 PoC

## Beschreibung

zstd-jni before 1.5.7-14 contains a use-after-free vulnerability where streams and contexts hold a dictionary's shared lock only during the load call, allowing the dictionary to be closed while still referenced. Attackers can close a dictionary after associating it with a stream or context, causing subsequent read or write operations to access freed native memory, resulting in silent data corruption or JVM crashes.

## CVSS-Vektor

```
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 3216860eea289fbbae0b191c0a4fd8b72dad949c (Commit)

## Referenzen

- <https://github.com/luben/zstd-jni/security/advisories/GHSA-947w-pxjj-c7m9>
- <https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555>
- <https://github.com/luben/zstd-jni/commit/a560131d7834598afd9cea6b7c107bc88e915936>
- <https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java>
- <https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java>
- <https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14>
- <https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938>
- <https://github.com/luben/zstd-jni>
- <https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-of-compression-and-decompression-dictionaries>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-87825) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_