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TI-2026-74077 Aliases CVE-2026-110257GHSA-jv96-63p8-4rfx

Excessive memory allocation in OW2 ASM via BootstrapMethods attribute

Priority LOW 29CWE-789Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-789.

Summary

OW2 ASM from 5.0 before 9.11 contains an excessive memory allocation flaw in ClassReader.readBootstrapMethodsAttribute(), which sizes an array from a count field without validating the attribute length (CWE-789). An attacker with no privileges can supply a crafted class file of about 100 bytes that forces roughly 2 GB of allocation, causing an OutOfMemoryError that crashes the JVM or consumes a thread. The attack requires local access and user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0017 6th percentileScored 2026-11-07
Fix Partial ASM (OW2): 9.11Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OW2ASM5.0 to before 9.119.11Patch availableCNA
  • ASM VendorOW2 Affected 5.0 to before 9.11 Fixed in 9.11 Patch available CNA

Remediation

Upgrade OW2 ASM to version 9.11, which is the fixed version. Red Hat fixes Red Hat Hardened Images in RHSA-2026:83847, released 2026-10-16. Red Hat's plan for Red Hat build of Quarkus is none_available, so no fix is planned there.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

  • Fix · CNA ASM (OW2) Fixed in 9.11

Red Hat 1 advisory

  • RHSA-2026:83847 Released 2026-10-16 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images maven3.9-3.9.16-0.4.hum1@noarch@public-hummingbird-aarch64-rpms, maven3.9-3.9.16-0.4.hum1@noarch@public-hummingbird-s390x-rpms, maven3.9-3.9.16-0.4.hum1@noarch@public-hummingbird-x86_64-rpms +4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    OW2 ASM 9.11

    9 records Highest priority Priority LOW 9 LOW

    Other records, highest priority first

    • TI-2026-74085 Excessive resource consumption in OW2 ASM Analyzer allows denial of servicePriority LOW 29
    • TI-2026-74084 Exponential memory allocation in OW2 ASM JSRInlinerAdapterPriority LOW 29
    • TI-2026-74083 Uncontrolled recursion in OW2 ASM SignatureReader enables denial of servicePriority LOW 29
    Show all 9 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat build of QuarkusAffectedNo fix yet
Red Hat Hardened ImagesFixed RHSA-2026:83847

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110257
  2. 2026-10-14 Alias added: GHSA-jv96-63p8-4rfx
  3. 2026-10-15 CISA SSVC decision points changed
  4. 2026-10-15 Priority changed: MEDIUM → LOW
  5. 2026-10-20 Fix available: RHSA-2026:83847 · Red Hat
  6. 2026-10-20 Fix available: Red Hat Hardened Images · Red Hat
  7. 2026-10-20 CVSS score added · Red Hat
  8. 2026-11-02 Affected versions changed · Red Hat

References

Patch 2

Other 2

  • TI-2026-76174 Infinite loop in OW2 ASM Label.resolve() enables denial of service CVSS 4.0MEDIUM 6.8
  • TI-2026-74085 Excessive resource consumption in OW2 ASM Analyzer allows denial of service CVSS 4.0MEDIUM 6.8
  • TI-2026-74084 Exponential memory allocation in OW2 ASM JSRInlinerAdapter CVSS 4.0MEDIUM 6.8
  • TI-2026-74083 Uncontrolled recursion in OW2 ASM SignatureReader enables denial of service CVSS 4.0MEDIUM 6.8
  • TI-2026-74081 Crafted class files exhaust CPU in OW2 ASM ClassWriter CVSS 4.0MEDIUM 6.8
  • TI-2026-74080 Quadratic memory allocation in OW2 ASM exception handlers CVSS 4.0MEDIUM 6.8
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences