Rust advisories / bra
Vulnerability CriticalRUSTSEC-2021-0008 · bra
RUSTSEC-2021-0008: reading on uninitialized buffer can cause UB (`impl<R> BufRead for GreedyAccessReader<R>`)
Short answerA security vulnerability in the bra crate: reading on uninitialized buffer can cause UB (`impl<R> BufRead for GreedyAccessReader<R>`). Critical severity (CVSS 9.1). Fixed in 0.1.1: update to a fixed version.
| Crate | bra |
|---|---|
| Type | Vulnerability (memory-exposure) |
| Affected versions | Before 0.1.1. |
| Fixed in | 0.1.1 |
| Severity | Critical, CVSS 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| Published | 2021-01-02 |
| Last changed | 2023-11-08 |
| Also known as | CVE-2021-25905, GHSA-j8qq-58cr-8cc7 |
What to do
- See which version you have:
cargo tree -i bra(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p bra. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for examplebra = "0.1.1") 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 creates an uninitialized buffer and passes it to user-provided Read implementation.
This is unsound, because it allows safe Rust code to exhibit an undefined behavior (read from uninitialized memory).
The flaw was corrected in version 0.1.1 by zero-initializing a newly allocated buffer before handing it to a user-provided Read implementation.
References
- Package: crates.io/crates/bra
- Advisory: rustsec.org/advisories/RUSTSEC-2021-0008.html
- Report: github.com/Enet4/bra-rs/issues/1
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
Are you affected?Check your whole dependency treePaste Cargo.lock: every advisory, for your exact versions.Read it next →Also worth your time
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