HighFix available
libarchive — security advisory
A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.
- Products
- libarchive
- Affected versions
- 3.6.2-1, 3.6.2-1+deb12u1, 3.6.2-1+deb12u2, 3.6.2-1+deb12u3, 3.6.2-1+deb12u4, 3.7.4-4, 3.7.4-4+deb13u1, 3.8.4-1, 3.8.5-1, 3.8.6-1, 3.8.7-1, 3.8.8-1, 3.8.8-2, 3.8.9-1
- Fixed versions
- 3.6.2-1+deb12u5, 3.8.8-1
- CVEs
- CVE-2026-14164
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 30 Oct 2026, 16:35 UTC · Revision 1
Source evidence
A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.
osv:DEBIAN-CVE-2026-14164
libarchive
Fixed versions: 3.6.2-1+deb12u5
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: 3.8.8-1
Complete source record
{
"id": "8da9c03bdfd229a055710129be1b74f5692ed0b63ff4abe5e6a433186078ad92",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-14164",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-14164",
"summary": "A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.",
"evidence": "osv:DEBIAN-CVE-2026-14164",
"products": [
{
"name": {
"value": "libarchive",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.6.2-1+deb12u5",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "3.6.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.6.2-1+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "3.6.2-1+deb12u2",
"evidence": "/affected/0/versions"
},
{
"value": "3.6.2-1+deb12u3",
"evidence": "/affected/0/versions"
},
{
"value": "3.6.2-1+deb12u4",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libarchive",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "3.7.4-4",
"evidence": "/affected/1/versions"
},
{
"value": "3.7.4-4+deb13u1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.4-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.5-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.6-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.7-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.8-2",
"evidence": "/affected/1/versions"
},
{
"value": "3.8.9-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libarchive",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "3.8.8-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "3.7.4-4",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.4-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.5-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.6-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.7-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "DEBIAN-CVE-2026-14164",
"aliases": [
"DEBIAN-CVE-2026-14164"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.2-1+deb12u5"
}
]
}
],
"package": {
"name": "libarchive",
"purl": "pkg:deb/debian/libarchive?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.6.2-1",
"3.6.2-1+deb12u1",
"3.6.2-1+deb12u2",
"3.6.2-1+deb12u3",
"3.6.2-1+deb12u4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-14164.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libarchive",
"purl": "pkg:deb/debian/libarchive?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.7.4-4",
"3.7.4-4+deb13u1",
"3.8.4-1",
"3.8.5-1",
"3.8.6-1",
"3.8.7-1",
"3.8.8-1",
"3.8.8-2",
"3.8.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-14164.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.8-1"
}
]
}
],
"package": {
"name": "libarchive",
"purl": "pkg:deb/debian/libarchive?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.7.4-4",
"3.8.4-1",
"3.8.5-1",
"3.8.6-1",
"3.8.7-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-14164.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-15T09:47:33.829974108Z",
"provider": "osv",
"upstream": [
"CVE-2026-14164"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-14164"
]
},
"related_cves": [
{
"value": "CVE-2026-14164",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 327711,
"published_at": "2026-06-30T07:16:32.17+00:00"
}