OW2 ASM 9.11 before 9.11.1 contains an infinite loop vulnerability in Label.resolve() caused by 16-bit forward-reference offsets truncating when rewritten methods exceed 64 KB. Attackers can supply crafted class files whose transformed code grows past 65535 bytes, hanging ClassReader.accept() and denying service to build tools, instrumenters, agents, or analyzers.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 3
- StatusAwaiting Analysis → PublishedNVD modified 2026-10-19 16:38
- StatusReceived → Awaiting AnalysisNVD modified 2026-10-19 21:13
- First seenCVSS 6.8NVD modified 2026-10-19 17:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 5
- https://asm.ow2.io/versions.html
- https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_11/asm/src/main/java/org/objectweb/asm/Label.java#L417
- https://gitlab.ow2.org/asm/asm/-/commit/4bb1a4701e7b61c2163525b987a96a8db815cb68
- https://gitlab.ow2.org/asm/asm/-/merge_requests/480
- https://www.vulncheck.com/advisories/ow2-asm-9.11-before-9.11.1-denial-of-service-via-infinite-loop-in-label-resolve