UnratedFix available
Fix CVE(s): CVE-2026-63383, CVE-2026-63384
Type: advisorySources: OSV
* SECURITY UPDATE: integer overflow in evtag_unmarshal_header() - debian/patches/CVE-2026-63384.patch: reject payload lengths above INT_MAX in event_tagging.c, include/event2/tag.h - CVE-2026-63384 * SECURITY UPDATE: out-of-bounds read in decode_tag_internal() - debian/patches/CVE-2026-63383.patch: bound the tag decoding loop by the pulled-up length instead of the full buffer length in event_tagging.c - CVE-2026-63383
- Products
- libevent-2.1-6, libevent-core-2.1-6, libevent-dev, libevent-extra-2.1-6, libevent-openssl-2.1-6, libevent-pthreads-2.1-6
- Affected versions
- Not specified
- Fixed versions
- 2.1.8-stable-4build1+tuxcare.els1
- CVEs
- CVE-2026-63383, CVE-2026-63384
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:42 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2026-63383, CVE-2026-63384
core-osv · Original sourcePublished 24 Sept 2026, 12:12 UTC
* SECURITY UPDATE: integer overflow in evtag_unmarshal_header() - debian/patches/CVE-2026-63384.patch: reject payload lengths above INT_MAX in event_tagging.c, include/event2/tag.h - CVE-2026-63384 * SECURITY UPDATE: out-of-bounds read in decode_tag_internal() - debian/patches/CVE-2026-63383.patch: bound the tag decoding loop by the pulled-up length instead of the full buffer length in event_tagging.c - CVE-2026-63383
osv:CLSA-2026-1790251955
libevent-2.1-6
Fixed versions: 2.1.8-stable-4build1+tuxcare.els1
libevent-core-2.1-6
Fixed versions: 2.1.8-stable-4build1+tuxcare.els1
libevent-dev
Fixed versions: 2.1.8-stable-4build1+tuxcare.els1
libevent-extra-2.1-6
Fixed versions: 2.1.8-stable-4build1+tuxcare.els1
libevent-openssl-2.1-6
Fixed versions: 2.1.8-stable-4build1+tuxcare.els1
libevent-pthreads-2.1-6
Fixed versions: 2.1.8-stable-4build1+tuxcare.els1
Complete source record
{
"id": "7e4a4273e3825476fa0247543d74eec5a9807bc80d52dc537ce4b69ec6a87514",
"url": "https://osv.dev/vulnerability/CLSA-2026-1790251955",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-63383, CVE-2026-63384",
"summary": "* SECURITY UPDATE: integer overflow in evtag_unmarshal_header() - debian/patches/CVE-2026-63384.patch: reject payload lengths above INT_MAX in event_tagging.c, include/event2/tag.h - CVE-2026-63384 * SECURITY UPDATE: out-of-bounds read in decode_tag_internal() - debian/patches/CVE-2026-63383.patch: bound the tag decoding loop by the pulled-up length instead of the full buffer length in event_tagging.c - CVE-2026-63383",
"evidence": "osv:CLSA-2026-1790251955",
"products": [
{
"name": {
"value": "libevent-2.1-6",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.8-stable-4build1+tuxcare.els1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libevent-core-2.1-6",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.8-stable-4build1+tuxcare.els1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libevent-dev",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.8-stable-4build1+tuxcare.els1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libevent-extra-2.1-6",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.8-stable-4build1+tuxcare.els1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libevent-openssl-2.1-6",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.8-stable-4build1+tuxcare.els1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libevent-pthreads-2.1-6",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.8-stable-4build1+tuxcare.els1",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1790251955",
"aliases": [
"CLSA-2026-1790251955"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.8-stable-4build1+tuxcare.els1"
}
]
}
],
"package": {
"name": "libevent-2.1-6",
"purl": "pkg:deb/tuxcare/libevent-2.1-6?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-2026-1790251955.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.8-stable-4build1+tuxcare.els1"
}
]
}
],
"package": {
"name": "libevent-core-2.1-6",
"purl": "pkg:deb/tuxcare/libevent-core-2.1-6?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-2026-1790251955.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.8-stable-4build1+tuxcare.els1"
}
]
}
],
"package": {
"name": "libevent-dev",
"purl": "pkg:deb/tuxcare/libevent-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-2026-1790251955.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.8-stable-4build1+tuxcare.els1"
}
]
}
],
"package": {
"name": "libevent-extra-2.1-6",
"purl": "pkg:deb/tuxcare/libevent-extra-2.1-6?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-2026-1790251955.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.8-stable-4build1+tuxcare.els1"
}
]
}
],
"package": {
"name": "libevent-openssl-2.1-6",
"purl": "pkg:deb/tuxcare/libevent-openssl-2.1-6?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-2026-1790251955.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.8-stable-4build1+tuxcare.els1"
}
]
}
],
"package": {
"name": "libevent-pthreads-2.1-6",
"purl": "pkg:deb/tuxcare/libevent-pthreads-2.1-6?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-2026-1790251955.json"
}
}
],
"modified": "2026-10-26T09:32:04.173309269Z",
"provider": "osv",
"upstream": [
"CVE-2026-63383",
"CVE-2026-63384"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1790251955.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-63383",
"https://nvd.nist.gov/vuln/detail/CVE-2026-63384"
]
},
"related_cves": [
{
"value": "CVE-2026-63383",
"evidence": "/upstream"
},
{
"value": "CVE-2026-63384",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449574,
"published_at": "2026-09-24T12:12:46+00:00"
}