CVE-2026-110258

OW2 ASM 3.0 before 9.11 Excessive Memory Allocation via Multiple RET Instructions

CVE-2026-110258 is fixed in asm on 1 platform by DEBIAN-CVE-2026-110258 (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 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.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
asm · Debian 14	9.11.1-1	DEBIAN-CVE-2026-110258	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-2026-110258

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