LowFix available
libidn — security advisory
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.
- Products
- libidn
- Affected versions
- 1.41-1, 1.42-1, 1.42-2, 1.42-3, 1.43-1, 1.43-2, 1.43-3, 1.44-1
- Fixed versions
- 1.44-1
- CVEs
- CVE-2026-57053
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 12:18 UTC · Revision 2
Source evidence
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.
osv:DEBIAN-CVE-2026-57053
libidn
Fixed versions: Not specified
libidn
Fixed versions: Not specified
libidn
Fixed versions: 1.44-1
Complete source record
{
"id": "38f6d430b31156d628f7f054d32b02e03cb8fe874eaa42c9b4b6815638713aa8",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-57053",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-57053",
"summary": "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.",
"evidence": "osv:DEBIAN-CVE-2026-57053",
"products": [
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{
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"evidence": "/affected/0/versions"
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{
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"severity": "low",
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"aliases": [
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"metrics": [
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"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"
}
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"affected": [
{
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"ecosystem_specific": {
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{
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"package": {
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"ecosystem": "Debian:13"
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"versions": [
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"database_specific": {
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{
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"package": {
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],
"modified": "2026-10-26T11:47:32.810115983Z",
"provider": "osv",
"upstream": [
"CVE-2026-57053"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-57053"
]
},
"related_cves": [
{
"value": "CVE-2026-57053",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 450817,
"published_at": "2026-06-23T18:18:10.827+00:00"
}