CVE-2025-4432 | Ring: some aes functions may panic when overflow checking is enabled in ring

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.

Published: 2025-05-09 Last update: 2026-04-15 Assigner: [email protected] Source: [email protected]
NVD Status：Deferred，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-4432 is rated Low Risk (38.7/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.26%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-4432

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-23 0.21% 0.26% +0.05%
2 2026-05-22 0.26% 0.21% -0.05%
3 2026-03-05 — 0.26% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-4432

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2025-4432

GitHub Security Advisory for CVE-2025-4432

GHSA-4p46-pwfr-66x6 · Severity: medium · Ecosystem: rust — Some AES functions may panic when overflow checking is enabled in ring

OS Trackers for CVE-2025-4432

vendor priority summary link
debian not yet assigned CVE-2025-4432 not yet assigned priority: Debian including 1 source packages (rust-ring), 4 status rows across 4 suites (bookworm, forky, sid, trixie): resolved 3, open 1. https://security-tracker.debian.org/tracker/CVE-2025-4432
redhat medium — https://access.redhat.com/security/cve/CVE-2025-4432
ubuntu medium CVE-2025-4432 medium priority: Ubuntu including 1 source packages (rust-ring), 7 status rows across 7 suites (focal, jammy, noble, oracular, plucky, questing, upstream): needs-triage 4, ignored 2, DNE 1. https://ubuntu.com/security/CVE-2025-4432

Affected software / configurations for CVE-2025-4432

Vendor Product Version Raw CPE
No affected products in dataset.

References for CVE-2025-4432

cvelogic Threat Intelligence