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GHSA-mh64-ph39-mrc9

Cloudflare Quiche: Use-after-free in connection ID iterator FFI functions

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-11941

Packages

EcosystemPackageAffectedFixed in
crates.io quiche >= 0.20.0, < 0.29.2 0.29.2

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Cloudflare Quiche was affected by 2 use-after-free vulnerabilities in the connection ID iterator FFI functions. The `quiche_connection_id_iter_next` and `quiche_conn_retired_scid_next` functions would return a pointer to a `ConnectionId` to the applications via function arguments, but the the owned `ConnectionId` would be dropped at the end of those functions' scope. Only applications using those FFI functions are affected. The FFI API is disabled by default by a build-time feature flag. quiche 0.29.2 is the earliest version containing the fix for this issue.

References

External links from the advisory. They lead to third-party sites.