Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110659ELFIO through 3.12 NULL Pointer Dereference via relocation_section_accessor get_entry

Medium 5.5

In plain English

A medium-severity null pointer dereference in ELFIO from serge1. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.2%top 92.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
serge1	ELFIO	0 – through 3.12

Weakness: CWE-476 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

https://hackmd.io/@haind-pwn/elfio-relocation-get-entry-null-deref technical-description, exploit
https://github.com/serge1/ELFIO/blob/8ae6cec5d60495822ecd57d736f66149da9b1830/elfio/elfio_relocation.hpp#L142 technical-description
https://github.com/serge1/ELFIO product
VulnCheck Advisory: ELFIO through 3.12 NULL Pointer Dereference via relocation_section_accessor get_entry third-party-advisory