LowFix available
libarchive — security advisory
A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.
- 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, 3.6.2-1+deb12u5, 3.7.2-1, 3.7.2-1.1, 3.7.2-1.1~exp1, 3.7.2-2, 3.7.2-2.1, 3.7.4-1, 3.7.4-1.1, 3.7.4-2, 3.7.4-3, 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
- 3.8.9-1
- CVEs
- CVE-2026-17591
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 01:46 UTC · Revision 1
Source evidence
A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.
osv:DEBIAN-CVE-2026-17591
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: 3.8.9-1
Complete source record
{
"id": "5327a513ece65290984f56552c239bcbe9a40934e718aa8090d93a658936bea3",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-17591",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-17591",
"summary": "A flaw was found in libarchive. An attacker can cause a Denial of Service (DoS) or potential information disclosure due to a use-after-free vulnerability, which occurs when a program reads memory that has already been released. This issue arises when the archive_entry_copy_mac_metadata() function deallocates an internal buffer before completing a data copy. An attacker who can supply input to an application utilizing this function can trigger the flaw to crash the application or read uninitialized memory data.",
"evidence": "osv:DEBIAN-CVE-2026-17591",
"products": [
{
"name": {
"value": "libarchive",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"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"
},
{
"value": "3.6.2-1+deb12u5",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.2-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.2-1.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.2-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.2-2.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.4-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.4-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.4-3",
"evidence": "/affected/0/versions"
},
{
"value": "3.7.4-4",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.6-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.8-1",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.8-2",
"evidence": "/affected/0/versions"
},
{
"value": "3.8.9-1",
"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": "3.8.9-1",
"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"
},
{
"value": "3.8.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "3.8.8-2",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "low",
"structured": {
"id": "DEBIAN-CVE-2026-17591",
"aliases": [
"DEBIAN-CVE-2026-17591"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"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",
"3.6.2-1+deb12u5",
"3.7.2-1",
"3.7.2-1.1",
"3.7.2-1.1~exp1",
"3.7.2-2",
"3.7.2-2.1",
"3.7.4-1",
"3.7.4-1.1",
"3.7.4-2",
"3.7.4-3",
"3.7.4-4",
"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-2026-17591.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-2026-17591.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.9-1"
}
]
}
],
"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",
"3.8.8-1",
"3.8.8-2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-17591.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-23T18:05:01.115392519Z",
"provider": "osv",
"upstream": [
"CVE-2026-17591"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-17591"
]
},
"related_cves": [
{
"value": "CVE-2026-17591",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 424243,
"published_at": "2026-10-16T23:17:01.42+00:00"
}