Fix CVE(s): CVE-2023-32067
* SECURITY UPDATE: denial of service via a 0-length UDP packet - debian/patches/CVE-2023-32067.patch: in read_udp_packets() in ares_process.c, treat a 0-length UDP read as a 0-length packet and keep reading instead of tearing the server connection down; only a negative return value is now an error, and an answer from a mismatched address no longer stops the read loop. - CVE-2023-32067
- Products
- libc-ares-dev, libc-ares2
- Affected versions
- Not specified
- Fixed versions
- 1.14.0-1ubuntu0.2+tuxcare.els1
- CVEs
- CVE-2023-32067
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:41 UTC · Revision 1
Source evidence
* SECURITY UPDATE: denial of service via a 0-length UDP packet - debian/patches/CVE-2023-32067.patch: in read_udp_packets() in ares_process.c, treat a 0-length UDP read as a 0-length packet and keep reading instead of tearing the server connection down; only a negative return value is now an error, and an answer from a mismatched address no longer stops the read loop. - CVE-2023-32067
osv:CLSA-2026-1787663550
libc-ares-dev
Fixed versions: 1.14.0-1ubuntu0.2+tuxcare.els1
libc-ares2
Fixed versions: 1.14.0-1ubuntu0.2+tuxcare.els1
Complete source record
{
"id": "f9cda821e5e0e807fe23de90a691e9815ec14b5ce2a61709111fe3dd0c77c118",
"url": "https://osv.dev/vulnerability/CLSA-2026-1787663550",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2023-32067",
"summary": "* SECURITY UPDATE: denial of service via a 0-length UDP packet - debian/patches/CVE-2023-32067.patch: in read_udp_packets() in ares_process.c, treat a 0-length UDP read as a 0-length packet and keep reading instead of tearing the server connection down; only a negative return value is now an error, and an answer from a mismatched address no longer stops the read loop. - CVE-2023-32067",
"evidence": "osv:CLSA-2026-1787663550",
"products": [
{
"name": {
"value": "libc-ares-dev",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.14.0-1ubuntu0.2+tuxcare.els1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libc-ares2",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.14.0-1ubuntu0.2+tuxcare.els1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1787663550",
"aliases": [
"CLSA-2026-1787663550"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.14.0-1ubuntu0.2+tuxcare.els1"
}
]
}
],
"package": {
"name": "libc-ares-dev",
"purl": "pkg:deb/tuxcare/libc-ares-dev?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787663550.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.14.0-1ubuntu0.2+tuxcare.els1"
}
]
}
],
"package": {
"name": "libc-ares2",
"purl": "pkg:deb/tuxcare/libc-ares2?distro=ubuntu-18.04",
"ecosystem": "TuxCare:Ubuntu:18.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu18.04els/CLSA-2026-1787663550.json"
}
}
],
"modified": "2026-10-26T09:32:03.616423618Z",
"provider": "osv",
"upstream": [
"CVE-2023-32067"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1787663550.html",
"https://nvd.nist.gov/vuln/detail/CVE-2023-32067"
]
},
"related_cves": [
{
"value": "CVE-2023-32067",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449536,
"published_at": "2026-08-25T13:12:41+00:00"
}