CVE-2026-4046: CWE-617 Reachable assertion in The GNU C Library 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.
AI Analysis
Technical Summary
CVE-2026-4046 is a high-severity vulnerability in the GNU C Library's iconv() function affecting versions 2.43 and earlier. The vulnerability is a reachable assertion failure triggered when converting character sets IBM1390 or IBM1399, which may cause the application to crash. This can be exploited remotely to cause denial of service. The vulnerability is classified under CWE-617 (Reachable Assertion). No official patch or fix is currently referenced in the provided data.
Potential Impact
The vulnerability results in an application crash (denial of service) when processing certain character sets (IBM1390 or IBM1399) via iconv(). There is no impact on confidentiality or integrity reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Since no official patch is referenced, the recommended mitigation is to remove the IBM1390 and IBM1399 character sets from systems that do not require them. This trivial mitigation prevents triggering the assertion failure and associated crashes.
CVE-2026-4046: CWE-617 Reachable assertion in The GNU C Library glibc
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 v3.1
Score 7.5high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4046 is a high-severity vulnerability in the GNU C Library's iconv() function affecting versions 2.43 and earlier. The vulnerability is a reachable assertion failure triggered when converting character sets IBM1390 or IBM1399, which may cause the application to crash. This can be exploited remotely to cause denial of service. The vulnerability is classified under CWE-617 (Reachable Assertion). No official patch or fix is currently referenced in the provided data.
Potential Impact
The vulnerability results in an application crash (denial of service) when processing certain character sets (IBM1390 or IBM1399) via iconv(). There is no impact on confidentiality or integrity reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
Since no official patch is referenced, the recommended mitigation is to remove the IBM1390 and IBM1399 character sets from systems that do not require them. This trivial mitigation prevents triggering the assertion failure and associated crashes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- glibc
- Date Reserved
- 2026-03-12T10:12:32.994Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69cab88de6bfc5ba1d56ff2a
Added to database: 03/30/2026, 17:53:17 UTC
Last enriched: 07/15/2026, 11:23:43 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 333
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