CVE-2026-87877

Name	CVE-2026-87877
Description	zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM.
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-2jw3-mg7f-vw4q
Fixed by: https://github.com/luben/zstd-jni/commit/f38f9a1563113d96d0fc38baee543f7457dd8a8e (v1.5.7-14)
Fixed by: https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555 (v1.5.7-14)