Medium severity5.5NVD Advisory· Published Oct 14, 2026· Updated Oct 14, 2026
CVE-2026-110257
CVE-2026-110257
Description
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.
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Affected products
1- Range: <9.11
Patches
Vulnerability mechanics
References
5- asm.ow2.io/versions.htmlnvd
- gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/ClassReader.javanvd
- gitlab.ow2.org/asm/asm/-/commit/eb5fa95bb0670eaec2ecf9b8a3a501b48e5a967cnvd
- gitlab.ow2.org/asm/asm/-/merge_requests/456nvd
- www.vulncheck.com/advisories/ow2-asm-5.0-before-9.11-excessive-memory-allocation-via-bootstrapmethods-attributenvd
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