Bug 2453117 (CVE-2026-4046)

Summary: CVE-2026-4046 glibc: glibc: Denial of Service via iconv() function with specific character sets
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ashankar, codonell, dj, fweimer, pfrankli
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in glibc, the GNU C Library. A remote attacker could exploit this vulnerability by providing specially crafted inputs using the IBM1390 or IBM1399 character sets to the `iconv()` function. This could lead to an assertion failure, causing the application to crash and resulting in a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2453211, 2453212, 2453213    
Bug Blocks:    

Description OSIDB Bzimport 2026-03-30 18:01:43 UTC
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.