CVE-2026-110257

OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute

CVE-2026-110257 is fixed in asm on 1 platform by DEBIAN-CVE-2026-110257 (version 9.11.1-1), released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0017

6th percentile

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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
asm · Debian 14	9.11.1-1	DEBIAN-CVE-2026-110257	Oct 24, 2026

Details

Published
October 14, 2026
Weakness
Memory Allocation with Excessive Size Value
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-110257

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