CVE-2026-110258

MEDIUM 5.5

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

CVSS Score

5.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-789
Vendor	ow2
Product	asm
Published	Oct 14, 2026
Last Updated	Oct 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

OW2 / ASM

3.0 < 9.11

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.ow2.org: https://gitlab.ow2.org/asm/asm/-/merge_requests/458 gitlab.ow2.org: https://gitlab.ow2.org/asm/asm/-/commit/4dabfe0aef14f8cccb0617640a4add8fbcc4ed36 gitlab.ow2.org: https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/Label.java#L568 asm.ow2.io: https://asm.ow2.io/versions.html vulncheck.com: https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-excessive-memory-allocation-via-multiple-ret-instructions

Credits

Eric Bruneton