wolfSSL 5.8.4 wc_XChaCha20Poly1305_Decrypt integer underflow

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in wolfSSL 5.8.4. This vulnerability affects the function wc_XChaCha20Poly1305_Decrypt. Executing a manipulation can lead to integer underflow. This vulnerability is tracked as CVE-2025-11931. The attack can be launched remotely. No exploit exists. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in wolfSSL 5.8.4 and classified as critical. This vulnerability affects the function wc_XChaCha20Poly1305_Decrypt. The manipulation with an unknown input leads to a integer underflow vulnerability. The CWE definition for the vulnerability is CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Integer Underflow Leads to Out-of-Bounds Access in XChaCha20-Poly1305 Decrypt. This issue is hit specifically with a call to the function wc_XChaCha20Poly1305_Decrypt() which is not used with TLS connections, only from direct calls from an application.

The weakness was disclosed by Luigino Camastra. The advisory is shared for download at github.com. This vulnerability was named CVE-2025-11931 since 10/18/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 276577 (Linux Distros Unpatched Vulnerability : CVE-2025-11931), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (276577). Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer underflow
CWE: CWE-191 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 276577
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-11931

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

10/18/2025 CVE reserved
11/22/2025 +35 days Advisory disclosed
11/22/2025 +0 days VulDB entry created
12/05/2025 +13 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Luigino Camastra
Status: Confirmed

CVE: CVE-2025-11931 (🔒)
GCVE (CVE): GCVE-0-2025-11931
GCVE (VulDB): GCVE-100-333292

Entryinfo

Created: 11/22/2025 08:46
Updated: 12/05/2025 15:51
Changes: 11/22/2025 08:46 (66), 11/23/2025 05:24 (2), 12/05/2025 15:51 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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