UnratedFix available
Fix CVE(s): CVE-2026-43958
Type: advisorySources: OSV
* SECURITY UPDATE: stack-based buffer overflow in rrdcached CREATE request handling - debian/patches/CVE-2026-43958.patch: bound the av[] argument array in handle_request_create() so an oversized CREATE request with more than 128 DS:/RRA: definitions can no longer overflow the stack buffer, plus the accompanying upstream hardening in rrd_xport, rrd_graph, rrd_graph_helper and rrd_daemon. The rrd_xport fill loop uses the index-based bounds check from upstream follow-up a8174e6a rather than the timestamp comparison it originally shipped with. - CVE-2026-43958
- Products
- liblua5.1-rrd-dev, liblua5.1-rrd0, librrd-dev, librrd4, librrdp-perl, librrds-perl, lua-rrd, lua-rrd-dev, python-rrdtool, rrdcached, rrdtool, rrdtool-tcl, ruby-rrd
- Affected versions
- Not specified
- Fixed versions
- 1.5.5-4+tuxcare.els1
- CVEs
- CVE-2026-43958
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:40 UTC · Revision 1
Source evidence
* SECURITY UPDATE: stack-based buffer overflow in rrdcached CREATE request handling - debian/patches/CVE-2026-43958.patch: bound the av[] argument array in handle_request_create() so an oversized CREATE request with more than 128 DS:/RRA: definitions can no longer overflow the stack buffer, plus the accompanying upstream hardening in rrd_xport, rrd_graph, rrd_graph_helper and rrd_daemon. The rrd_xport fill loop uses the index-based bounds check from upstream follow-up a8174e6a rather than the timestamp comparison it originally shipped with. - CVE-2026-43958
osv:CLSA-2026-1787666659
liblua5.1-rrd-dev
Fixed versions: 1.5.5-4+tuxcare.els1
liblua5.1-rrd0
Fixed versions: 1.5.5-4+tuxcare.els1
librrd-dev
Fixed versions: 1.5.5-4+tuxcare.els1
librrd4
Fixed versions: 1.5.5-4+tuxcare.els1
librrdp-perl
Fixed versions: 1.5.5-4+tuxcare.els1
librrds-perl
Fixed versions: 1.5.5-4+tuxcare.els1
lua-rrd
Fixed versions: 1.5.5-4+tuxcare.els1
lua-rrd-dev
Fixed versions: 1.5.5-4+tuxcare.els1
python-rrdtool
Fixed versions: 1.5.5-4+tuxcare.els1
rrdcached
Fixed versions: 1.5.5-4+tuxcare.els1
rrdtool
Fixed versions: 1.5.5-4+tuxcare.els1
rrdtool-tcl
Fixed versions: 1.5.5-4+tuxcare.els1
ruby-rrd
Fixed versions: 1.5.5-4+tuxcare.els1
Complete source record
{
"id": "35633ac1a8902af078fe571670ebdb1d07a75c12b91052fbed04f5d190797cec",
"url": "https://osv.dev/vulnerability/CLSA-2026-1787666659",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-43958",
"summary": "* SECURITY UPDATE: stack-based buffer overflow in rrdcached CREATE request handling - debian/patches/CVE-2026-43958.patch: bound the av[] argument array in handle_request_create() so an oversized CREATE request with more than 128 DS:/RRA: definitions can no longer overflow the stack buffer, plus the accompanying upstream hardening in rrd_xport, rrd_graph, rrd_graph_helper and rrd_daemon. The rrd_xport fill loop uses the index-based bounds check from upstream follow-up a8174e6a rather than the timestamp comparison it originally shipped with. - CVE-2026-43958",
"evidence": "osv:CLSA-2026-1787666659",
"products": [
{
"name": {
"value": "liblua5.1-rrd-dev",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "liblua5.1-rrd0",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "librrd-dev",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "librrd4",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "librrdp-perl",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "librrds-perl",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "lua-rrd",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "lua-rrd-dev",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "python-rrdtool",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rrdcached",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rrdtool",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "rrdtool-tcl",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/11/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "ruby-rrd",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.5.5-4+tuxcare.els1",
"evidence": "/affected/12/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1787666659",
"aliases": [
"CLSA-2026-1787666659"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "liblua5.1-rrd-dev",
"purl": "pkg:deb/tuxcare/liblua5.1-rrd-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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "liblua5.1-rrd0",
"purl": "pkg:deb/tuxcare/liblua5.1-rrd0?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "librrd-dev",
"purl": "pkg:deb/tuxcare/librrd-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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "librrd4",
"purl": "pkg:deb/tuxcare/librrd4?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "librrdp-perl",
"purl": "pkg:deb/tuxcare/librrdp-perl?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "librrds-perl",
"purl": "pkg:deb/tuxcare/librrds-perl?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "lua-rrd",
"purl": "pkg:deb/tuxcare/lua-rrd?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "lua-rrd-dev",
"purl": "pkg:deb/tuxcare/lua-rrd-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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "python-rrdtool",
"purl": "pkg:deb/tuxcare/python-rrdtool?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "rrdcached",
"purl": "pkg:deb/tuxcare/rrdcached?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "rrdtool",
"purl": "pkg:deb/tuxcare/rrdtool?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "rrdtool-tcl",
"purl": "pkg:deb/tuxcare/rrdtool-tcl?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-2026-1787666659.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.5-4+tuxcare.els1"
}
]
}
],
"package": {
"name": "ruby-rrd",
"purl": "pkg:deb/tuxcare/ruby-rrd?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-2026-1787666659.json"
}
}
],
"modified": "2026-10-26T09:32:02.520513708Z",
"provider": "osv",
"upstream": [
"CVE-2026-43958"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1787666659.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-43958"
]
},
"related_cves": [
{
"value": "CVE-2026-43958",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449456,
"published_at": "2026-08-25T14:04:31+00:00"
}