LowFix available
libarchive — security advisory
A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.
- Products
- libarchive
- Affected versions
- 3.1.2-11build1, 3.1.2-11ubuntu0.16.04.1, 3.1.2-11ubuntu0.16.04.2, 3.1.2-11ubuntu0.16.04.3, 3.1.2-11ubuntu0.16.04.4, 3.1.2-11ubuntu0.16.04.5, 3.1.2-11ubuntu0.16.04.6, 3.1.2-11ubuntu0.16.04.7, 3.1.2-11ubuntu0.16.04.8, 3.1.2-11ubuntu0.16.04.8+esm1, 3.1.2-11ubuntu0.16.04.8+esm2, 3.1.2-11ubuntu0.16.04.8+esm3, 3.1.2-5ubuntu1, 3.1.2-7ubuntu1, 3.1.2-7ubuntu2, 3.1.2-7ubuntu2.1, 3.1.2-7ubuntu2.2, 3.1.2-7ubuntu2.3, 3.1.2-7ubuntu2.4, 3.1.2-7ubuntu2.6, 3.1.2-7ubuntu2.7, 3.1.2-7ubuntu2.8, 3.1.2-7ubuntu2.8+esm1, 3.1.2-7ubuntu2.8+esm3, 3.1.2-7ubuntu2.8+esm4, 3.1.2-7ubuntu2.8+esm5, 3.2.2-3.1, 3.2.2-3.1ubuntu0.1, 3.2.2-3.1ubuntu0.2, 3.2.2-3.1ubuntu0.3, 3.2.2-3.1ubuntu0.4, 3.2.2-3.1ubuntu0.5, 3.2.2-3.1ubuntu0.6, 3.2.2-3.1ubuntu0.7, 3.2.2-3.1ubuntu0.7+esm1, 3.2.2-3.1ubuntu0.7+esm2, 3.2.2-3.1ubuntu0.7+esm3, 3.4.0-1, 3.4.0-1build1, 3.4.0-1ubuntu2, 3.4.0-2ubuntu1, 3.4.0-2ubuntu1.1, 3.4.0-2ubuntu1.2, 3.4.0-2ubuntu1.3, 3.4.0-2ubuntu1.4, 3.4.0-2ubuntu1.5, 3.4.0-2ubuntu1.5+esm1, 3.4.0-2ubuntu1.5+esm2, 3.4.0-2ubuntu1.5+esm3, 3.4.3-2, 3.4.3-2build1, 3.5.2-1, 3.5.2-1ubuntu1, 3.6.0-1ubuntu1, 3.6.0-1ubuntu1.1, 3.6.0-1ubuntu1.2, 3.6.0-1ubuntu1.3, 3.6.0-1ubuntu1.4, 3.6.0-1ubuntu1.5, 3.6.0-1ubuntu1.6, 3.6.0-1ubuntu1.7, 3.6.0-1ubuntu1.8, 3.6.2-1ubuntu1, 3.7.2-1.1ubuntu2, 3.7.2-1ubuntu1, 3.7.2-1ubuntu2, 3.7.2-2, 3.7.2-2ubuntu0.1, 3.7.2-2ubuntu0.2, 3.7.2-2ubuntu0.3, 3.7.2-2ubuntu0.4, 3.7.2-2ubuntu0.5, 3.7.2-2ubuntu0.6, 3.7.2-2ubuntu0.7, 3.7.2-2ubuntu0.8, 3.7.7-0ubuntu3, 3.8.5-1ubuntu1, 3.8.5-1ubuntu2, 3.8.5-1ubuntu2.1, 3.8.5-1ubuntu2.2
- Fixed versions
- 3.6.0-1ubuntu1.9, 3.7.2-2ubuntu0.9, 3.8.5-1ubuntu2.3
- CVEs
- CVE-2026-16517
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 10:04 UTC · Revision 1
Source evidence
A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.
osv:UBUNTU-CVE-2026-16517
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: Not specified
libarchive
Fixed versions: 3.6.0-1ubuntu1.9
libarchive
Fixed versions: 3.7.2-2ubuntu0.9
libarchive
Fixed versions: 3.8.5-1ubuntu2.3
Complete source record
{
"id": "30fe546f5d66751a0c8ae1d5183ec0202584212e6fd1872901c9d0314d0758dc",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-16517",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-16517",
"summary": "A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.",
"evidence": "osv:UBUNTU-CVE-2026-16517",
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{
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{
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{
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"evidence": "/affected/2/versions"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"value": "3.4.0-2ubuntu1.3",
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{
"value": "3.4.0-2ubuntu1.4",
"evidence": "/affected/3/versions"
},
{
"value": "3.4.0-2ubuntu1.5",
"evidence": "/affected/3/versions"
},
{
"value": "3.4.0-2ubuntu1.5+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "3.4.0-2ubuntu1.5+esm2",
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{
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{
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{
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{
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{
"value": "3.6.0-1ubuntu1.2",
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{
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"aliases": [
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},
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"database_specific": {
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},
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},
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},
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],
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},
"ecosystem_specific": {
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{
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},
{
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}
]
}
},
{
"ranges": [
{
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{
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},
{
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}
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}
],
"package": {
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"ecosystem": "Ubuntu:22.04:LTS"
},
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"3.4.3-2build1",
"3.5.2-1",
"3.5.2-1ubuntu1",
"3.6.0-1ubuntu1",
"3.6.0-1ubuntu1.1",
"3.6.0-1ubuntu1.2",
"3.6.0-1ubuntu1.3",
"3.6.0-1ubuntu1.4",
"3.6.0-1ubuntu1.5",
"3.6.0-1ubuntu1.6",
"3.6.0-1ubuntu1.7",
"3.6.0-1ubuntu1.8"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"
},
"ecosystem_specific": {
"binaries": [
{
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},
{
"binary_name": "libarchive13",
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}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.2-2ubuntu0.9"
}
]
}
],
"package": {
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"3.6.2-1ubuntu1",
"3.7.2-1ubuntu1",
"3.7.2-1ubuntu2",
"3.7.2-1.1ubuntu2",
"3.7.2-2",
"3.7.2-2ubuntu0.1",
"3.7.2-2ubuntu0.2",
"3.7.2-2ubuntu0.3",
"3.7.2-2ubuntu0.4",
"3.7.2-2ubuntu0.5",
"3.7.2-2ubuntu0.6",
"3.7.2-2ubuntu0.7",
"3.7.2-2ubuntu0.8"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libarchive-tools",
"binary_version": "3.7.2-2ubuntu0.9"
},
{
"binary_name": "libarchive13t64",
"binary_version": "3.7.2-2ubuntu0.9"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.5-1ubuntu2.3"
}
]
}
],
"package": {
"name": "libarchive",
"purl": "pkg:deb/ubuntu/libarchive?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"3.7.7-0ubuntu3",
"3.8.5-1ubuntu1",
"3.8.5-1ubuntu2",
"3.8.5-1ubuntu2.1",
"3.8.5-1ubuntu2.2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-16517.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libarchive-tools",
"binary_version": "3.8.5-1ubuntu2.3"
},
{
"binary_name": "libarchive13t64",
"binary_version": "3.8.5-1ubuntu2.3"
}
],
"availability": "No subscription required"
}
}
],
"modified": "2026-10-08T19:47:05.699529086Z",
"provider": "osv",
"upstream": [
"CVE-2026-16517"
],
"references": [
"https://ubuntu.com/security/CVE-2026-16517",
"https://www.cve.org/CVERecord?id=CVE-2026-16517",
"https://ubuntu.com/security/notices/USN-8902-1"
]
},
"related_cves": [
{
"value": "CVE-2026-16517",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 104534,
"published_at": "2026-07-21T23:17:00+00:00"
}