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Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110270OW2 ASM 3.0 before 9.11 Exponential Memory Allocation in JSRInlinerAdapter

Medium 5.5

In plain English

A medium-severity security flaw in ASM from OW2. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 93.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

OW2 ASM 3.0 before 9.11 contains an uncontrolled memory allocation vulnerability in the asm-commons JSRInlinerAdapter that inlines JSR/RET subroutines without memory or work limits. Attackers can supply a crafted class file with nested subroutines to force O(2^n) memory allocation, causing an OutOfMemoryError that crashes the JVM.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12asmno fix listedDEBIAN-CVE-2026-110270
Debian:13asmno fix listedDEBIAN-CVE-2026-110270
Debian:14asm9.11.1-1DEBIAN-CVE-2026-110270
Ubuntu:22.04:LTSasmno fix listedUBUNTU-CVE-2026-110270
Ubuntu:24.04:LTSasmno fix listedUBUNTU-CVE-2026-110270
Ubuntu:26.04:LTSasmno fix listedUBUNTU-CVE-2026-110270
Ubuntu:26.10asmno fix listedUBUNTU-CVE-2026-110270

Affected products (as reported)

VendorProductVersions
OW2 ASM 3.0 – before 9.11

Weakness: CWE-407 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References