Description
A flaw was found in Rust's Ring package. A panic may be triggered when overflow checking is enabled. In the QUIC protocol, this flaw allows an attacker to induce this panic by sending a specially crafted packet. It will likely occur unintentionally in 1 out of every 2**32 packets sent or received.
References8
- access.redhat.com/security/cve/CVE-2025-4432
- bugzilla.redhat.com/show_bug.cgi?id=2350655
- github.com/advisories/GHSA-4p46-pwfr-66x6
- github.com/briansmith/ring
- github.com/briansmith/ring/blob/main/RELEASES.md#version-01712-…
- github.com/briansmith/ring/commit/ec2d3cf1d91f148c84e4806b4f0b3…
- github.com/briansmith/ring/pull/2447
- rustsec.org/advisories/RUSTSEC-2025-0009.html
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 1% percentile: 64 · as of 7 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.