Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🦀
🦀 crates.io
Not in CISA KEV
HIGH severity

CVE-2021-45694 — rdiff

HIGH

CVE-2021-45694 is a high-severity (CVSS 7.5) CWE-908 vulnerability in rdiff. No vendor fix is recorded yet; mitigation options are listed below.

Window may read from uninitialized memory locations in rdiff

Also known asGHSA-q579-9wp9-gfp2RUSTSEC-2021-0094
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.1%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs63th percentile — riskier than 63% of all scored CVEsHighest risk
0.00%0.52%1.04%1.56%0.3%0.3%0.3%1.1%1.1%Apr 26Jun 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-45694 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🦀rdiff

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

An issue was discovered in the rdiff crate through version 0.1.2 for Rust. Window may read from uninitialized memory locations.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🦀crates.iordiffall versionsNo fix

Affected Products

1 product · 1 configurations
Application
rdiffrdiff_project
≤ 0.1.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rdiff, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    No patched version of rdiff has shipped for CVE-2021-45694 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

An issue was discovered in the rdiff crate through version 0.1.2 for Rust. Window may read from uninitialized memory locations.
O3 Security · Impact-Aware SCA

Is CVE-2021-45694 in your dependencies?

Find it across crates.io, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2021-45694: rdiff (High 7.5)