MediumFix available
asm — security advisory
OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in ClassWriter.replaceAsmInstructions() that allows attackers to cause denial of service through crafted class files. Attackers can supply a class with a large method containing many long forward jumps, triggering unbounded toByteArray() recursion and a StackOverflowError during transformation.
- Products
- asm
- Affected versions
- 9.10.1-1, 9.11.1-1, 9.4-1, 9.5-1, 9.7-1, 9.7-2, 9.7.1-1, 9.8-1, 9.8-2, 9.9.1-1
- Fixed versions
- 9.11.1-1
- CVEs
- CVE-2026-110259
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:55 UTC · Revision 1
Source evidence
OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in ClassWriter.replaceAsmInstructions() that allows attackers to cause denial of service through crafted class files. Attackers can supply a class with a large method containing many long forward jumps, triggering unbounded toByteArray() recursion and a StackOverflowError during transformation.
osv:DEBIAN-CVE-2026-110259
asm
Fixed versions: Not specified
asm
Fixed versions: Not specified
asm
Fixed versions: 9.11.1-1
Complete source record
{
"id": "bb7683b37a91fcf416de76daee8a0abe28bfacacc1182454f81166343aebdbb3",
"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-110259",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "DEBIAN-CVE-2026-110259",
"summary": "OW2 ASM 3.0 before 9.11 contains an uncontrolled recursion vulnerability in ClassWriter.replaceAsmInstructions() that allows attackers to cause denial of service through crafted class files. Attackers can supply a class with a large method containing many long forward jumps, triggering unbounded toByteArray() recursion and a StackOverflowError during transformation.",
"evidence": "osv:DEBIAN-CVE-2026-110259",
"products": [
{
"name": {
"value": "asm",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.10.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.11.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.4-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.5-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.7-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.7-2",
"evidence": "/affected/0/versions"
},
{
"value": "9.7.1-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.8-1",
"evidence": "/affected/0/versions"
},
{
"value": "9.8-2",
"evidence": "/affected/0/versions"
},
{
"value": "9.9.1-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "asm",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.10.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.11.1-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.8-1",
"evidence": "/affected/1/versions"
},
{
"value": "9.8-2",
"evidence": "/affected/1/versions"
},
{
"value": "9.9.1-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "asm",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "9.11.1-1",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": [
{
"value": "9.10.1-1",
"evidence": "/affected/2/versions"
},
{
"value": "9.8-1",
"evidence": "/affected/2/versions"
},
{
"value": "9.8-2",
"evidence": "/affected/2/versions"
},
{
"value": "9.9.1-1",
"evidence": "/affected/2/versions"
}
]
}
],
"severity": "medium",
"structured": {
"id": "DEBIAN-CVE-2026-110259",
"aliases": [
"DEBIAN-CVE-2026-110259"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "asm",
"purl": "pkg:deb/debian/asm?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"9.10.1-1",
"9.11.1-1",
"9.4-1",
"9.5-1",
"9.7-1",
"9.7-2",
"9.7.1-1",
"9.8-1",
"9.8-2",
"9.9.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110259.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "asm",
"purl": "pkg:deb/debian/asm?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"9.10.1-1",
"9.11.1-1",
"9.8-1",
"9.8-2",
"9.9.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110259.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "9.11.1-1"
}
]
}
],
"package": {
"name": "asm",
"purl": "pkg:deb/debian/asm?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"9.10.1-1",
"9.8-1",
"9.8-2",
"9.9.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110259.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
],
"modified": "2026-10-27T10:00:41.062611492Z",
"provider": "osv",
"upstream": [
"CVE-2026-110259"
],
"references": [
"https://security-tracker.debian.org/tracker/CVE-2026-110259"
]
},
"related_cves": [
{
"value": "CVE-2026-110259",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 461487,
"published_at": "2026-10-14T15:17:07.65+00:00"
}