GNU Binutils ELF Section Handler Vulnerability in Version 2.47
CVE-2026-91781

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Binutils
Vendor
CVE Published:
15 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-91781?

A security vulnerability has been identified in GNU Binutils version 2.47, specifically within the elf_x86_64_common_section_index function of the ELF Section Handler. This flaw allows for a null pointer dereference, requiring local exploitation. The issue has been publicly disclosed, raising concerns about potential misuse. Users are strongly advised to update to version 2.48, which resolves this vulnerability. The associated patch can be found under the identifier 7322e9bc30cb282575a701c307851fd3d66fee68, ensuring the integrity and security of systems utilizing this product.

Affected Version(s)

Binutils 2.47

Binutils 2.48

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-91781 - Proof of Concept

References

https://vuldb.com/vuln/404052
vdb-entrytechnical-description
https://vuldb.com/vuln/404052/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-91781
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ech06 (VulDB User)
.