CVE-2026-57053

Public on 2026-06-23

Modified on 2026-06-25

Description

GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.

Severity

Medium

See what this means

CVSS v3 Base Score

5.3

See breakdown

Affected Packages

Platform	Package	Status
Amazon Linux 2 - Core	glibc	Pending Fix
Amazon Linux 2 - Core	libidn	Pending Fix
Amazon Linux 2023	libidn	Pending Fix
Amazon Linux 2 - Core	libidn2	Not Affected
Amazon Linux 2023	libidn2	Not Affected

CVSS Scores

	Score Type	Score	Vector
Amazon Linux	CVSSv3	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-57053 Mitre: CVE-2026-57053