NULL pointer dereference in Serge1 Elfio
CVE-2026-110659
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/elfio-relocation-get-entry-null-deref (technical-description, exploit)
- github.com/serge1/ELFIO/blob/8ae6cec5d60495822ecd57d736f66149da9b1830/elfio/elf… (technical-description)
- github.com/serge1/ELFIO (product)
- www.vulncheck.com/advisories/elfio-through-3.12-null-pointer-dereference-via-re… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-110659?
- CVE-2026-110659 is a medium-severity vulnerability in Serge1 Elfio, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2026-10-14.
- How severe is CVE-2026-110659?
- Medium severity. CVSS v3 base score is 5.5 out of 10.