This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-57053 →

DEBIAN-CVE-2026-57053

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_interna...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 libidn

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 libidn

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 libidn

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.44-1"}]}]

References

advisory security-tracker.debian.org