CVE-2025-4432 Ring: some aes functions may panic when overflow checking is enabled in ring
An attacker can cause a denial of service by sending crafted QUIC packets that trigger a panic in the Ring library when overflow checking is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-4432?
CVE-2025-4432 is a medium-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 9 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-770
Which versions are affected by CVE-2025-4432?
6 open source packages ship an affected version, including ring and github.com/briansmith/ring.
| Package | Affected | Fixed in |
|---|---|---|
ring crates.io | All versions | 0.17.12 |
ring crates.io | All versions | 0.17.12 |
ring crates.io | All versions | 0.17.13 |
ring crates.io | All versions | 0.17.13 |
ring crates.io | From 0.0.0-0 | 0.17.12 |
github.com/briansmith/ring Go | All versions | None |
How do I fix CVE-2025-4432?
Upgrade ring to a fixed version for your release line: 0.17.12 or 0.17.13.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-4432 being exploited?
There is no known exploitation of CVE-2025-4432 in the wild and no public exploit code.
Sources
Also known as AZL-99024, CLEANSTART-2025-EX68648, CLEANSTART-2025-HK10192, DEBIAN-CVE-2025-4432, GHSA-4p46-pwfr-66x6, GHSA-c86p-w88r-qvqr and 7 more.