UnratedFix available
Fix CVE(s): CVE-2026-20215, CVE-2026-20216, CVE-2026-20217
Type: advisorySources: OSV
* SECURITY UPDATE: Out-of-bounds write via 7z substream count overflow - debian/patches/CVE-2026-20215.patch: reject 7z archives whose total unpack-stream count would overflow UInt32 before it is accumulated in libclamav/7z/7zIn.c - CVE-2026-20215 * SECURITY UPDATE: Denial of service via InstallShield extraction size-limit bypass - debian/patches/CVE-2026-20216.patch: enforce maxfilesize and maxscansize against the cumulative inflated output and propagate hard-stop limit errors out of is_extract_cab() in libclamav/ishield.c - CVE-2026-20216 * SECURITY UPDATE: Invalid free in the PESpin unpacker cleanup loop - debian/patches/CVE-2026-20217.patch: shift the working bitmap instead of bitman in the PESpin cleanup loop so only unpacker-allocated sections are freed in libclamav/spin.c - CVE-2026-20217
- Products
- clamav, clamav-base, clamav-daemon, clamav-doc, clamav-docs, clamav-freshclam, clamav-milter, clamav-testfiles, clamdscan, libclamav-dev, libclamav12
- Affected versions
- Not specified
- Fixed versions
- 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
- CVEs
- CVE-2026-20215, CVE-2026-20216, CVE-2026-20217
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:09 UTC · Revision 1
Source evidence
Fix CVE(s): CVE-2026-20215, CVE-2026-20216, CVE-2026-20217
core-osv · Original sourcePublished 16 Jul 2026, 14:04 UTC
* SECURITY UPDATE: Out-of-bounds write via 7z substream count overflow - debian/patches/CVE-2026-20215.patch: reject 7z archives whose total unpack-stream count would overflow UInt32 before it is accumulated in libclamav/7z/7zIn.c - CVE-2026-20215 * SECURITY UPDATE: Denial of service via InstallShield extraction size-limit bypass - debian/patches/CVE-2026-20216.patch: enforce maxfilesize and maxscansize against the cumulative inflated output and propagate hard-stop limit errors out of is_extract_cab() in libclamav/ishield.c - CVE-2026-20216 * SECURITY UPDATE: Invalid free in the PESpin unpacker cleanup loop - debian/patches/CVE-2026-20217.patch: shift the working bitmap instead of bitman in the PESpin cleanup loop so only unpacker-allocated sections are freed in libclamav/spin.c - CVE-2026-20217
osv:CLSA-2026-1784210640
clamav
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-base
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-daemon
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-doc
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-docs
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-freshclam
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-milter
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamav-testfiles
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
clamdscan
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
libclamav-dev
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
libclamav12
Fixed versions: 1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3
Complete source record
{
"id": "055d946f806308c7baf989f16a84d4d9a5cd723b0c064cc7ffb44969ad66e6dd",
"url": "https://osv.dev/vulnerability/CLSA-2026-1784210640",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Fix CVE(s): CVE-2026-20215, CVE-2026-20216, CVE-2026-20217",
"summary": "* SECURITY UPDATE: Out-of-bounds write via 7z substream count overflow - debian/patches/CVE-2026-20215.patch: reject 7z archives whose total unpack-stream count would overflow UInt32 before it is accumulated in libclamav/7z/7zIn.c - CVE-2026-20215 * SECURITY UPDATE: Denial of service via InstallShield extraction size-limit bypass - debian/patches/CVE-2026-20216.patch: enforce maxfilesize and maxscansize against the cumulative inflated output and propagate hard-stop limit errors out of is_extract_cab() in libclamav/ishield.c - CVE-2026-20216 * SECURITY UPDATE: Invalid free in the PESpin unpacker cleanup loop - debian/patches/CVE-2026-20217.patch: shift the working bitmap instead of bitman in the PESpin cleanup loop so only unpacker-allocated sections are freed in libclamav/spin.c - CVE-2026-20217",
"evidence": "osv:CLSA-2026-1784210640",
"products": [
{
"name": {
"value": "clamav",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-base",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-daemon",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-doc",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-docs",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-freshclam",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-milter",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamav-testfiles",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "clamdscan",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libclamav-dev",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "libclamav12",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1784210640",
"aliases": [
"CLSA-2026-1784210640"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav",
"purl": "pkg:deb/tuxcare/clamav?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-base",
"purl": "pkg:deb/tuxcare/clamav-base?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-daemon",
"purl": "pkg:deb/tuxcare/clamav-daemon?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-doc",
"purl": "pkg:deb/tuxcare/clamav-doc?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-docs",
"purl": "pkg:deb/tuxcare/clamav-docs?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-freshclam",
"purl": "pkg:deb/tuxcare/clamav-freshclam?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-milter",
"purl": "pkg:deb/tuxcare/clamav-milter?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamav-testfiles",
"purl": "pkg:deb/tuxcare/clamav-testfiles?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "clamdscan",
"purl": "pkg:deb/tuxcare/clamdscan?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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "libclamav-dev",
"purl": "pkg:deb/tuxcare/libclamav-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-2026-1784210640.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4.3+dfsg-0ubuntu0.18.04.1+tuxcare.els3"
}
]
}
],
"package": {
"name": "libclamav12",
"purl": "pkg:deb/tuxcare/libclamav12?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-2026-1784210640.json"
}
}
],
"modified": "2026-10-26T09:31:47.205719224Z",
"provider": "osv",
"upstream": [
"CVE-2026-20215",
"CVE-2026-20216",
"CVE-2026-20217"
],
"references": [
"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2026-1784210640.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-20215",
"https://nvd.nist.gov/vuln/detail/CVE-2026-20216",
"https://nvd.nist.gov/vuln/detail/CVE-2026-20217"
]
},
"related_cves": [
{
"value": "CVE-2026-20215",
"evidence": "/upstream"
},
{
"value": "CVE-2026-20216",
"evidence": "/upstream"
},
{
"value": "CVE-2026-20217",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448482,
"published_at": "2026-07-16T14:04:28+00:00"
}