Medium
zbar — security advisory
ZBar commit 2ea2ca58 contains an undefined-behavior vulnerability in the Code 128 decode6() function. When processing specially crafted Code 128 input, decode_e() can return -1 for an invalid edge pattern, and decode6() subsequently left-shifts this negative signed value while constructing the edge signature. The operation invokes undefined behavior and can terminate trap-mode UBSan builds with SIGILL, resulting in denial of service.
- Products
- zbar
- Affected versions
- 0.23.92-7, 0.23.92-7+deb12u1, 0.23.92-8, 0.23.92-9, 0.23.93-1, 0.23.93-1.1, 0.23.93-1.1~exp1, 0.23.93-10, 0.23.93-2, 0.23.93-3, 0.23.93-4, 0.23.93-5, 0.23.93-6, 0.23.93-7, 0.23.93-8, 0.23.93-9
- Fixed versions
- Not specified
- CVEs
- CVE-2026-88371
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 03:42 UTC · Revision 1
Source evidence
ZBar commit 2ea2ca58 contains an undefined-behavior vulnerability in the Code 128 decode6() function. When processing specially crafted Code 128 input, decode_e() can return -1 for an invalid edge pattern, and decode6() subsequently left-shifts this negative signed value while constructing the edge signature. The operation invokes undefined behavior and can terminate trap-mode UBSan builds with SIGILL, resulting in denial of service.
osv:DEBIAN-CVE-2026-88371
zbar
Fixed versions: Not specified
zbar
Fixed versions: Not specified
zbar
Fixed versions: Not specified
Complete source record
{
"id": "49ab61a29c96de918f444d95da92a9ca63c3169219f9db258f376f042eb5e563",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-88371",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-88371",
"summary": "ZBar commit 2ea2ca58 contains an undefined-behavior vulnerability in the Code 128 decode6() function. When processing specially crafted Code 128 input, decode_e() can return -1 for an invalid edge pattern, and decode6() subsequently left-shifts this negative signed value while constructing the edge signature. The operation invokes undefined behavior and can terminate trap-mode UBSan builds with SIGILL, resulting in denial of service.",
"evidence": "osv:DEBIAN-CVE-2026-88371",
"products": [
{
"name": {
"value": "zbar",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.23.92-7",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.92-7+deb12u1",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.92-8",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.92-9",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-1",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-1.1",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-1.1~exp1",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-10",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-2",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-3",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-4",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-5",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-6",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-7",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-8",
"evidence": "/affected/0/versions"
},
{
"value": "0.23.93-9",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "zbar",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.23.93-10",
"evidence": "/affected/1/versions"
},
{
"value": "0.23.93-8",
"evidence": "/affected/1/versions"
},
{
"value": "0.23.93-9",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "zbar",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "0.23.93-10",
"evidence": "/affected/2/versions"
},
{
"value": "0.23.93-8",
"evidence": "/affected/2/versions"
},
{
"value": "0.23.93-9",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-88371",
"aliases": [
"DEBIAN-CVE-2026-88371"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zbar",
"purl": "pkg:deb/debian/zbar?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"0.23.92-7",
"0.23.92-7+deb12u1",
"0.23.92-8",
"0.23.92-9",
"0.23.93-1",
"0.23.93-1.1",
"0.23.93-1.1~exp1",
"0.23.93-10",
"0.23.93-2",
"0.23.93-3",
"0.23.93-4",
"0.23.93-5",
"0.23.93-6",
"0.23.93-7",
"0.23.93-8",
"0.23.93-9"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88371.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zbar",
"purl": "pkg:deb/debian/zbar?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"0.23.93-10",
"0.23.93-8",
"0.23.93-9"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88371.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "zbar",
"purl": "pkg:deb/debian/zbar?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"0.23.93-10",
"0.23.93-8",
"0.23.93-9"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-88371.json"
},
"ecosystem_specific": {
"urgency": "unimportant"
}
}
],
"modified": "2026-10-07T10:00:46.856144282Z",
"provider": "osv",
"upstream": [
"CVE-2026-88371"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-88371"
]
},
"related_cves": [
{
"value": "CVE-2026-88371",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 94696,
"published_at": "2026-09-24T16:17:14.1+00:00"
}