CVE-2026-90852: luben zstd-jni Dictionary Sharing ZstdCompressCtx.java ZstdCompressCtx.loadDict use after free
A vulnerability has been found in luben zstd-jni up to 1.5.7-13. This vulnerability affects the function ZstdCompressCtx.loadDict of the file ZstdCompressCtx.java of the component Dictionary Sharing. Such manipulation leads to use after free. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.5.7-14 is able to resolve this issue. The name of the patch is a560131d7834598afd9cea6b7c107bc88e915936. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
luben zstd-jni (Dictionary Sharing) - ZstdCompressCtx.loadDict (ZstdCompressCtx.java)to a version that resolves this vulnerability.Fixed in 1.5.7-14Patch a560131d7834598afd9cea6b7c107bc88e915936
Event History
Frequently Asked Questions
Which deployments are affected?
Deployments using luben zstd-jni version 1.5.7-13 or earlier are affected in the Dictionary Sharing component, specifically through ZstdCompressCtx.loadDict in ZstdCompressCtx.java.
Does exploitation require authentication or user interaction?
No. The supplied severity vector indicates network-based exploitation with low attack complexity, no privileges required, and no user interaction.
Is there public exploit information?
Yes. The exploit has been publicly disclosed and may be used.
What is the recommended remediation?
Upgrade the affected luben zstd-jni component to version 1.5.7-14. The referenced patch is a560131d7834598afd9cea6b7c107bc88e915936.