CVE-2026-57053

Name
CVE-2026-57053
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
cve@mitre.org https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.html
cve@mitre.org https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:gnu:libidn:*:*:*:*:*:*:*:* libidn >= 0.1.15 < 1.44

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
libidn edge-main 1.44-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
libidn edge-main 1.43-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn edge-main 1.42-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn edge-main 1.33-r0 None possibly vulnerable
libidn 3.24-main 1.43-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn 3.23-main 1.43-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn 3.22-main 1.42-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn 3.22-main 1.33-r0 None possibly vulnerable
libidn 3.21-main 1.42-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn 3.21-main 1.33-r0 None possibly vulnerable
libidn 3.20-main 1.42-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn 3.20-main 1.33-r0 None possibly vulnerable
libidn 3.19-main 1.41-r3 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
libidn 3.19-main 1.33-r0 None possibly vulnerable