UnratedFix available
Fix CVE(s): CVE-2026-33846, CVE-2026-42009
Type: advisorySources: OSV
* SECURITY UPDATE: heap buffer overflow in DTLS handshake reassembly - debian/patches/CVE-2026-33846.patch: add length-consistency and array bounds checks in merge_handshake_packet in lib/gnutls_buffers.c to reject DTLS fragments with mismatching or oversized claimed length - CVE-2026-33846 * SECURITY UPDATE: denial of service via non-conforming qsort comparator - debian/patches/CVE-2026-42009.patch: return 0 for equal sequence numbers in handshake_compare in lib/gnutls_buffers.c so DTLS packet ordering follows the qsort strict-weak-ordering contract - CVE-2026-42009
- Products
- gnutls-bin, gnutls-doc, guile-gnutls, libgnutls-dev, libgnutls-openssl27, libgnutls28-dev, libgnutls30, libgnutlsxx28
- Affected versions
- Not specified
- Fixed versions
- 3.4.10-4ubuntu1.9+tuxcare.els3
- CVEs
- CVE-2026-33846, CVE-2026-42009
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:09 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2026-33846, CVE-2026-42009
core-osv · Original sourcePublished 11 Aug 2026, 22:07 UTC
* SECURITY UPDATE: heap buffer overflow in DTLS handshake reassembly - debian/patches/CVE-2026-33846.patch: add length-consistency and array bounds checks in merge_handshake_packet in lib/gnutls_buffers.c to reject DTLS fragments with mismatching or oversized claimed length - CVE-2026-33846 * SECURITY UPDATE: denial of service via non-conforming qsort comparator - debian/patches/CVE-2026-42009.patch: return 0 for equal sequence numbers in handshake_compare in lib/gnutls_buffers.c so DTLS packet ordering follows the qsort strict-weak-ordering contract - CVE-2026-42009
osv:CLSA-2026-1784018375
gnutls-bin
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
gnutls-doc
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
guile-gnutls
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
libgnutls-dev
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
libgnutls-openssl27
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
libgnutls28-dev
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
libgnutls30
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
libgnutlsxx28
Fixed versions: 3.4.10-4ubuntu1.9+tuxcare.els3
Complete source record
{
"id": "6d4f40a36aa7b844371fc0016e134c6b4e8a6287c4ab47bf54a742a55f3f5232",
"url": "https://osv.dev/vulnerability/CLSA-2026-1784018375",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-33846, CVE-2026-42009",
"summary": "* SECURITY UPDATE: heap buffer overflow in DTLS handshake reassembly - debian/patches/CVE-2026-33846.patch: add length-consistency and array bounds checks in merge_handshake_packet in lib/gnutls_buffers.c to reject DTLS fragments with mismatching or oversized claimed length - CVE-2026-33846 * SECURITY UPDATE: denial of service via non-conforming qsort comparator - debian/patches/CVE-2026-42009.patch: return 0 for equal sequence numbers in handshake_compare in lib/gnutls_buffers.c so DTLS packet ordering follows the qsort strict-weak-ordering contract - CVE-2026-42009",
"evidence": "osv:CLSA-2026-1784018375",
"products": [
{
"name": {
"value": "gnutls-bin",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "gnutls-doc",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "guile-gnutls",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libgnutls-dev",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libgnutls-openssl27",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libgnutls28-dev",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libgnutls30",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libgnutlsxx28",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.4.10-4ubuntu1.9+tuxcare.els3",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1784018375",
"aliases": [
"CLSA-2026-1784018375"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "gnutls-bin",
"purl": "pkg:deb/tuxcare/gnutls-bin?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "gnutls-doc",
"purl": "pkg:deb/tuxcare/gnutls-doc?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "guile-gnutls",
"purl": "pkg:deb/tuxcare/guile-gnutls?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "libgnutls-dev",
"purl": "pkg:deb/tuxcare/libgnutls-dev?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "libgnutls-openssl27",
"purl": "pkg:deb/tuxcare/libgnutls-openssl27?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "libgnutls28-dev",
"purl": "pkg:deb/tuxcare/libgnutls28-dev?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "libgnutls30",
"purl": "pkg:deb/tuxcare/libgnutls30?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.10-4ubuntu1.9+tuxcare.els3"
}
]
}
],
"package": {
"name": "libgnutlsxx28",
"purl": "pkg:deb/tuxcare/libgnutlsxx28?distro=ubuntu-16.04",
"ecosystem": "TuxCare:Ubuntu:16.04"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1784018375.json"
}
}
],
"modified": "2026-10-26T09:31:47.113035082Z",
"provider": "osv",
"upstream": [
"CVE-2026-33846",
"CVE-2026-42009"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1784018375.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-33846",
"https://nvd.nist.gov/vuln/detail/CVE-2026-42009"
]
},
"related_cves": [
{
"value": "CVE-2026-33846",
"evidence": "/upstream"
},
{
"value": "CVE-2026-42009",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448473,
"published_at": "2026-08-11T22:07:33+00:00"
}