RUSTSEC-2026-0404Published

Double free in `DCtx::try_clone`

Exact source revision recorded 26 Oct 2026 14:35:44 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · RUSTSEC-2026-0404

Published

`DCtx::try_clone` (`experimental` feature, deprecated) is a plain copy of the C context. A context owning a dictionary (from `load_dictionary`, `ref_prefix` or `init_using_dict`) or a dictionary table (`ref_ddict` with `RefMultipleDDicts`) ended up with both copies freeing it. A context cloned mid-frame resumed on uninitialized stream state. The clone also silently lost the `WindowLogMax` limit. The flaw was corrected by refusing to clone such contexts, and by carrying over the parameters the copy leaves out.

Source published: 16 Oct 2026 12:00:00 UTC
Source modified: 26 Oct 2026 14:00:05 UTC
Observed here: 26 Oct 2026 14:35:44 UTC
Source terms: OSV · upstream source license applies

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