CVE-2026-4046
Received Received - Intake
Assertion Failure in GNU C Library iconv() Causes Remote Crash

Publication date: 2026-03-30

Last updated on: 2026-04-20

Assigner: GNU C Library

Description
The iconv() function in the GNU C Library versions 2.43 and earlier may crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets, which may be used to remotely crash an application. This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them.
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Meta Information
Published
2026-03-30
Last Modified
2026-04-20
Generated
2026-06-16
AI Q&A
2026-03-30
EPSS Evaluated
2026-06-15
NVD
CVE-2026-4046
EUVD
EUVD-2026-17144
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gnu glibc to 2.43 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-617 The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
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Executive Summary

The vulnerability exists in the iconv() function of the GNU C Library versions 2.43 and earlier. It may cause the function to crash due to an assertion failure when converting inputs from the IBM1390 or IBM1399 character sets.

This crash can be triggered remotely, potentially causing an application using this function to stop working unexpectedly.

Impact Analysis

This vulnerability can lead to a denial of service condition by crashing applications that use the iconv() function when processing certain character sets (IBM1390 or IBM1399).

An attacker could exploit this remotely to cause an application to crash, potentially disrupting service availability.

Mitigation Strategies

This vulnerability can be trivially mitigated by removing the IBM1390 and IBM1399 character sets from systems that do not need them.

Compliance Impact

The vulnerability in the iconv() function of the GNU C Library may cause application crashes due to assertion failures when converting certain character sets. However, it does not directly impact confidentiality, integrity, or availability of data in a way that would affect compliance with standards like GDPR or HIPAA.

Since the vulnerability leads to potential denial of service (application crash) but does not result in data leakage or unauthorized access, its effect on compliance with data protection regulations is minimal.

Mitigation by removing the affected character sets can prevent crashes, thereby maintaining system availability, which is a component of compliance frameworks.

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