CVE-2026-76149

Deferred Deferred - Pending Action

Integer Overflow in CorvusSKK Dictionary File

Publication date: 2026-08-26

Last updated on: 2026-08-28

Assigner: JPCERT/CC

Description

CorvusSKK contains an integer overflow vulnerability, which may allow malicious data to be written to a dictionary file.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-26

Last Modified

2026-08-28

Generated

2026-09-16

AI Q&A

2026-08-26

EPSS Evaluated

2026-09-14

NVD

CVE-2026-76149

EUVD

EUVD-2026-66245

Affected Vendors & Products

Vendor	Product	Version / Range
corvusskk	corvusskk	3.3.4
corvusskk	corvusskk	to 3.3.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

CorvusSKK has an integer overflow vulnerability that could allow attackers to write malicious data into a dictionary file by exploiting improper handling of integer values.

Detection Guidance

To detect this vulnerability, check the installed version of CorvusSKK. If it is below 3.3.4, the system is vulnerable. Use commands like 'corvusskk --version' or inspect installed packages via package managers (e.g., 'apt list --installed | grep corvusskk' on Debian-based systems).

Additionally, monitor for unusual file writes or crashes in dictionary handling processes, as these may indicate exploitation attempts.

Impact Analysis

This vulnerability may allow attackers to corrupt or manipulate dictionary files used by CorvusSKK, potentially leading to incorrect text input or system instability.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with GDPR, HIPAA, or other standards. The vulnerability involves an integer overflow that could allow malicious data writes to a dictionary file, potentially affecting system integrity and availability. However, no explicit compliance implications are mentioned in the context.

Mitigation Strategies

Update CorvusSKK to the latest version to address the integer overflow vulnerability. Monitor dictionary file writes for unexpected changes or large data entries.

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