CVE-2025-66566

NameCVE-2025-66566
Descriptionyawkat LZ4 Java provides LZ4 compression for Java. Insufficient clearing of the output buffer in Java-based decompressor implementations in lz4-java 1.10.0 and earlier allows remote attackers to read previous buffer contents via crafted compressed input. In applications where the output buffer is reused without being cleared, this may lead to disclosure of sensitive data. JNI-based implementations are not affected. This vulnerability is fixed in 1.10.1.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1122026

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
lz4-java (PTS)bullseye1.5.1-3vulnerable
bookworm1.8.0-3vulnerable
forky, sid, trixie1.8.0-4vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
lz4-javasource(unstable)(unfixed)1122026

Notes

https://github.com/yawkat/lz4-java/security/advisories/GHSA-cmp6-m4wj-q63q
Fixed by: https://github.com/yawkat/lz4-java/commit/33d180cb70c4d93c80fb0dc3ab3002f457e93840 (v1.10.1)

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