CVE-2020-29562

glibc: assertion failure in iconv when converting invalid UCS4

Published Dec 4, 2020 CVSS 3.1 · 4.8 Medium EPSS 1.7% KEV · Not listed
Description
The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2020-21925 The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.
Ubuntu USN Ubuntu USN USN-5310-1 GNU C Library vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Oct 14, 2026, 9:44 AM
Reserved
Dec 4, 2020, 12:00 AM
Status
Modified
Published
Dec 4, 2020, 7:15 AM
Modified
Oct 14, 2026, 10:17 AM
Severity
Moderate
Public date
Nov 19, 2020, 12:00 AM