OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute
OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread.
CVE-2026-110257
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: cve:CVE-2026-110257
ASM
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://gitlab.ow2.org/asm/asm",
"vendor": "OW2",
"product": "ASM",
"versions": [
{
"status": "affected",
"version": "5.0",
"lessThan": "9.11",
"versionType": "custom"
}
],
"packageURL": "pkg:maven/org.ow2.asm/asm",
"collectionURL": "https://repo1.maven.org/maven2/",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-110257
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #22129 · Revision 1
- Added to Heist Feed
- Publisher date