Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of the zstd-safe crate from 4.1.4 before 7.4.0, and from 8.0.0 before 8.2.0, are affected. In the experimental, deprecated DCtx::try_clone function, a decompression context holding a dictionary could be cloned so that both copies freed the same dictionary, and a context cloned mid-frame could resume on uninitialized state; the source gives few details on how an attacker would reach this. Upgrade zstd-safe to 7.4.0 or 8.2.0. No workaround is listed beyond avoiding try_clone on such contexts.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
No source has published a CVSS score for this record yet.
- CISA KEV Not listed.
- EPSS No score.
Timeline
- 31 Oct 2026, 14:24 UTC First seen by agentprime
- 31 Oct 2026, 14:24 UTC Confirmed by OSV