Bug 2552305 (CVE-2026-110257)

Summary: CVE-2026-110257 org.ow2.asm/asm: OW2 ASM: Denial of Service via excessive memory allocation
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in OW2 ASM. An attacker can cause a Denial of Service (DoS) by providing a specially crafted Java class file. Due to missing attribute length validation during class parsing, processing the file triggers excessive memory allocation, exhausting system resources and crashing the application or the Java Virtual Machine (JVM).
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Description OSIDB Bzimport 2026-10-14 14:36:44 UTC 
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.