CVE-2026-87825

Name	CVE-2026-87825
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
zstd-jni-java (PTS)	bookworm	1.5.2-5+ds-3	vulnerable
	trixie	1.5.2-5+ds-7	vulnerable
	forky, sid	1.5.2-5+ds-8	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
zstd-jni-java	source	(unstable)	(unfixed)

Notes

https://github.com/luben/zstd-jni/security/advisories/GHSA-947w-pxjj-c7m9
Fixed by: https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555 (v1.5.7-14)
Fixed by: https://github.com/luben/zstd-jni/commit/a560131d7834598afd9cea6b7c107bc88e915936 (v1.5.7-14)