Description
OW2 ASM 3.0 before 9.11 contains a denial of service vulnerability that allows attackers to exhaust CPU by supplying crafted class files processed with ClassWriter.COMPUTE_FRAMES. Attackers can craft methods that make the unbounded MethodWriter.computeAllFrames() fix point algorithm converge slowly, tying up transforming threads for unbounded time.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| OW2 | ASM | >= 3.0, < 9.11 |
References
- https://asm.ow2.io/versions.html
- https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/MethodWriter.java#L1595
- https://gitlab.ow2.org/asm/asm/-/commit/ab68bbd2521359b7c8cd3517c6331ced3d817ed0
- https://gitlab.ow2.org/asm/asm/-/merge_requests/463
- https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-excessive-cpu-consumption-via-classwriter-compute-frames
Timeline
- Published
- Oct 14, 2026
- Last modified
- Oct 14, 2026
- NVD status
- Awaiting Analysis