# CVE-2026-87825

## Summary

- **CVE ID:** CVE-2026-87825
- **Severity:** HIGH
- **CVSS Score:** 7.7 (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)
- **CWE:** CWE-416
- **Published:** Sep 9, 2026
- **Last Modified:** Sep 9, 2026

## Description

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.

## Affected Products

- luben — zstd-jni (1.3.8-4)

## References

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

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._