DEBIAN-CVE-2026-4426
A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.
DEBIAN-CVE-2026-4426
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-4426
libarchive
Source reference: /affected/0/package/name
- Affected versions
- 3.6.2-1
Source reference:
/affected/0/versions3.6.2-1+deb12u1Source reference:
/affected/0/versions3.6.2-1+deb12u2Source reference:
/affected/0/versions3.6.2-1+deb12u3Source reference:
/affected/0/versions - Fixed versions
- 3.6.2-1+deb12u4
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
libarchive
Source reference: /affected/1/package/name
- Affected versions
- 3.7.4-4
Source reference:
/affected/1/versions - Fixed versions
- 3.7.4-4+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
libarchive
Source reference: /affected/2/package/name
- Affected versions
- 3.7.4-4
Source reference:
/affected/2/versions3.8.4-1Source reference:
/affected/2/versions3.8.5-1Source reference:
/affected/2/versions3.8.6-1Source reference:
/affected/2/versions - Fixed versions
- 3.8.7-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.2-1+deb12u4"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4426.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.7.4-4+deb13u1"
}
]
}
],
"package": {
"name": "libarchive",
"purl": "pkg:deb/debian/libarchive?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.7.4-4"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4426.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.8.7-1"
}
]
}
],
"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"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-4426.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #57071 · Revision 1
- Added to Heist Feed
- Publisher date