AIKIDO-2026-569174
zstd-jni is vulnerable to Use-After-Free
73
High Risk
This Affects:
zstd-jniTL;DR
ZstdCompressCtx.loadDict takes the dictionary lock, stores the native dictionary pointer, and releases the lock before later compression calls. Closing the dictionary frees that native object while the context still uses the pointer, so the next compress call uses freed memory and can crash the JVM. The fix keeps the dictionary lock until the context is closed.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your code closes a dictionary after ZstdCompressCtx.loadDict.
Background info
zstd-jni is vulnerable to Use-After-Free in versions 1.4.4-2 - 1.5.7-13.
How to fix this
Upgrade the com.github.luben:zstd-jni library to the patch version.
Links
GitHub Release
Other
github.com/luben/zstd-jni/compare/v1.5.7-13...v1.5.7-14github.com/luben/zstd-jni/
vuldb.com/cve/CVE-2026-90852vuldb.com/submit/927022vuldb.com/vuln/403407vuldb.com/vuln/403407/cti
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