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CVE-2026-110258— OW2 ASM 3.0 before 9.11 Excessive Memory Allocation via Multiple RET Instructions

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 至 9.11 版本（不含 9.11）在 方法中存在一个过度内存分配漏洞，未能强制执行“每个 JSR 对应单个 RET”的规则。攻击者可以提供一个精心构造的无效类文件，其中包含针对同一 JSR 指令的多个 RET 指令，从而触发大约 2 GB 的内存分配，导致 JVM 崩溃。

CVSS 5.5 · Medium EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
OW2 ASM 3.0< 9.11 affected
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I. Basic Information for CVE-2026-110258

Vulnerability Information
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Vulnerability Title
OW2 ASM 3.0 before 9.11 Excessive Memory Allocation via Multiple RET Instructions
Source: CVE Program / CVE List V5
Vulnerability Description
OW2 ASM 3.0 before 9.11 contains an excessive memory allocation vulnerability in Label.addSubroutineRetSuccessors() that fails to enforce the single-RET-per-JSR rule. Attackers can supply a crafted invalid class file with multiple RET instructions for one JSR, triggering a roughly 2 GB allocation 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
未经控制的内存分配
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-2026-110258

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III. Intelligence Information for CVE-2026-110258

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Other References for CVE-2026-110258 (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-2026-110270 5.5 MEDIUM OW2 ASM 3.0 before 9.11 Exponential Memory Allocation in JSRInlinerAdapter
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-789

V. Comments for CVE-2026-110258

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