---
id: CVE-2026-110659
title: >-
  ELFIO through 3.12 contains a NULL pointer dereference vulnerability in
  relocation_section_accessor get_entry() that allows attackers to crash
  applications via an unvalidated sh_link index
summary: >-
  ELFIO through 3.12 contains a NULL pointer dereference vulnerability in
  relocation_section_accessor get_entry() that allows attackers to crash
  applications via an unvalidated sh_link index. Attackers can supply a crafted
  ELF file whose S…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:17:42.780'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110659'
references:
  - url: 'https://github.com/serge1/ELFIO'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/serge1/ELFIO/blob/8ae6cec5d60495822ecd57d736f66149da9b1830/elfio/elfio_relocation.hpp#L142
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@haind-pwn/elfio-relocation-get-entry-null-deref'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/elfio-through-3.12-null-pointer-dereference-via-relocation-section-accessor-get-entry
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-14T16:40:32.114Z'
---

## Overview

ELFIO through 3.12 contains a NULL pointer dereference vulnerability in relocation_section_accessor get_entry() that allows attackers to crash applications via an unvalidated sh_link index. Attackers can supply a crafted ELF file whose SHT_REL or SHT_RELA section has a dangling sh_link, causing find_hash_section() to dereference null and deny service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.