Rust advisories / actix-codec
Vulnerability CriticalRUSTSEC-2020-0049 · actix-codec
RUSTSEC-2020-0049: Use-after-free in Framed due to lack of pinning
Short answerA security vulnerability in the actix-codec crate: Use-after-free in Framed due to lack of pinning. Critical severity (CVSS 9.8). Fixed in 0.3.0-beta.1: update to a fixed version.
| Crate | actix-codec |
|---|---|
| Type | Vulnerability (memory-corruption) |
| Affected versions | Before 0.3.0-beta.1. |
| Fixed in | 0.3.0-beta.1 |
| Severity | Critical, CVSS 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2020-01-30 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2020-35902, GHSA-rqgx-hpg4-456r |
What to do
- See which version you have:
cargo tree -i actix-codec(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p actix-codec. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for exampleactix-codec = "0.3.0-beta.1") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Affected versions of this crate did not require the buffer wrapped in Framed to be pinned, but treated it as if it had a fixed location in memory. This may result in a use-after-free.
The flaw was corrected by making the affected functions accept Pin<&mut Self> instead of &mut self.
References
- Package: crates.io/crates/actix-codec
- Advisory: rustsec.org/advisories/RUSTSEC-2020-0049.html
- Report: github.com/actix/actix-net/issues/91
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Up next
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