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

Quick assessment

Affected
OW2 ASM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OW2 ASM 3.0 到 9.11（不含）版本中存在一个未受控内存分配漏洞，位于 asm-commons 模块的 JSRInlinerAdapter 中。该适配器在内联 JSR/RET 子程序时，没有对内存或工作量设置任何限制。攻击者可以通过提供一个包含嵌套子程序的构造恶意类文件，触发 O(2^n) 级别的内存分配，导致 JVM 因内存不足错误（OutOfMemoryError）而崩溃。

CVSS 5.5 · Medium EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
OW2 ASM 3.0< 9.11 affected
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I. Basic Information for CVE-2026-110270

Vulnerability Information
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Vulnerability Title
OW2 ASM 3.0 before 9.11 Exponential Memory Allocation in JSRInlinerAdapter
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OW2 ASM 3.0 ~ 9.11 -

II. Public POCs for CVE-2026-110270

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III. Intelligence Information for CVE-2026-110270

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Other References for CVE-2026-110270 (4)

Same Patch Batch · OW2 · 2026-10-14 · 9 CVEs total

CVE-2026-110257 5.5 MEDIUM OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute
CVE-2026-110259 5.5 MEDIUM OW2 ASM 3.0 before 9.11 Uncontrolled Recursion via ClassWriter.replaceAsmInstructions()
CVE-2026-110263 5.5 MEDIUM OW2 ASM 3.0 before 9.11 Uncontrolled Recursion in SignatureReader
CVE-2026-110260 5.5 MEDIUM OW2 ASM 3.0 before 9.11 Quadratic Memory Allocation via Exception Handlers
CVE-2026-110258 5.5 MEDIUM OW2 ASM 3.0 before 9.11 Excessive Memory Allocation via Multiple RET Instructions
CVE-2026-110591 5.5 MEDIUM OW2 ASM 1.4.3 before 9.11 Excessive Resource Consumption via Analyzer
CVE-2026-110261 5.5 MEDIUM OW2 ASM 3.0 before 9.11 Excessive CPU Consumption via ClassWriter COMPUTE_FRAMES
CVE-2026-110262 3.3 LOW OW2 ASM 3.1 before 9.11 Excessive Memory Allocation in AdviceAdapter

IV. Related Vulnerabilities

Same product: ASM
Same vendor: OW2
Same weakness: CWE-407

V. Comments for CVE-2026-110270

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