CVE-2026-110659 serge1 CVE debrief

Who should care

Defenders responsible for ELFIO deployments, security teams assessing exposure, and developers using ELFIO in their applications should be aware of this vulnerability and take necessary actions to mitigate it.

Why it matters

This vulnerability allows attackers to crash applications using ELFIO through 3.12 by providing crafted ELF files, leading to denial of service. Defenders should verify ELFIO versions, assess exposure, and monitor for suspicious inputs.

• Denial of service through application crashes
• Potential for attackers to supply crafted ELF files
• Need for verification of ELFIO versions and exposure
• Importance of monitoring and restricting suspicious ELF file inputs

Technical summary

The ELFIO library through version 3.12 contains a NULL pointer dereference vulnerability in the relocation_section_accessor get_entry() function. This vulnerability can be exploited by providing a crafted ELF file with a dangling sh_link in the SHT_REL or SHT_RELA section, leading to a denial of service. The vulnerability allows attackers to crash applications using ELFIO through 3.12 by providing crafted ELF files. Defenders should prioritize verifying ELFIO versions and assessing exposure in their environments. The vulnerability can be triggered by supplying a crafted ELF file, leading to application crashes and potential denial of service.

Defensive priority

Defenders should prioritize verifying ELFIO versions and assessing exposure in their environments.

Recommended defensive actions

• Verify ELFIO versions in use and assess exposure
• Review and update ELFIO to a version beyond 3.12 if possible
• Monitor for and restrict suspicious ELF file inputs
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details on the vulnerability, including its description and affected versions. The vulnerability is caused by a NULL pointer dereference in the relocation_section_accessor get_entry() function. The CVE Program record and NIST NVD detail page provide official information on the vulnerability. The source item provides additional details on the vulnerability. Defenders should verify ELFIO versions and assess exposure in their environments. The vulnerability can be exploited by providing a craftedELF

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.