CVE-2020-29562
glibc: assertion failure in iconv when converting invalid UCS4
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · November 19, 2020
Updated · June 27, 2026
Description
A denial of service flaw was found in the way glibc's iconv function handled UCS4 text containing an irreversible character. This flaw causes an application compiled with glibc and using the vulnerable function to terminate with an assertion, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.8CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
CWE-617 · Reachable Assertion