← Vulnerability feed

Vulnerability record · CVE-2026-4046 · published 30 March 2026

CVE-2026-4046: Gnu glibc vulnerability

Gnu · Glibc

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.

7.5 CVSS 3.1 High EPSS 0.66% · top 50.3% CWE-617 · CWE-617
7.5CVSS 3.1 base score
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
14 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://inbox.sourceware.org/libc-announce/[email protected]/T/#u
https://sourceware.org/bugzilla/show_bug.cgi?id=33980 ExploitIssue TrackingPatch
https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=advisories/GLIBC-SA-2026-0007;hb=HEAD Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-082556.html

Track CVE-2026-4046 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2023-4911GNU C Library ld.so GLIBC_TUNABLES heap buffer overflowThe GNU C Library dynamic loader ld.so mishandles the GLIBC_TUNABLES environment variable, causing a heap-based buffer overflow and out-of-bounds wri…KEVEPSS 81%analysed10.0CVE-2015-0235glibc gethostbyname heap buffer overflow (GHOST)CVE-2015-0235 is a heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2 and other 2.x versions before 2.18. It is reach…EPSS 95%analysed9.8CVE-2026-5450Gnu glibc heap-based buffer overflow vulnerabilityCalling the scanf family of functions with a %mc (malloc'd character match) in the GNU C Library version 2.7 to version 2.43 with a format width spec…EPSS 0.72%9.8CVE-2023-0687Gnu glibc classic buffer overflow vulnerabilityA vulnerability was found in GNU C Library 2.38. It has been declared as critical. This vulnerability affects the function __monstartup of the file g…EPSS 1.1%9.8CVE-2023-25139Gnu glibc out-of-bounds write vulnerabilitysprintf in the GNU C Library (glibc) 2.37 has a buffer overflow (out-of-bounds write) in some situations with a correct buffer size. This is unrelate…EPSS 1.4%9.8CVE-2022-23218Gnu glibc classic buffer overflow vulnerabilityThe deprecated compatibility function svcunix_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its path argument on t…EPSS 4.8%9.8CVE-2022-23219Gnu glibc classic buffer overflow vulnerabilityThe deprecated compatibility function clnt_create in the sunrpc module of the GNU C Library (aka glibc) through 2.34 copies its hostname argument on …EPSS 4.3%9.8CVE-2021-33574Gnu glibc use after free vulnerabilityThe mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes ob…EPSS 2.9%

Source: NIST National Vulnerability Database (record CVE-2026-4046), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.