Null Pointer Dereference in GNU Binutils Affects Users
CVE-2026-91780

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Binutils
Vendor
CVE Published:
15 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-91780?

A critical weakness has been identified in GNU Binutils 2.47, specifically within the elf_link_add_object_symbols function in bfd/elflink.c. This vulnerability can lead to null pointer dereference, posing risks for local exploitation. Despite early notification to the project team via a bug report, there has been no public response or fix yet. The exploit is already available in the wild, indicating a pressing need for mitigation. Users are advised to remain vigilant about security measures and stay updated on potential patches or workarounds.

Affected Version(s)

Binutils 2.47

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-2026-91780 - Proof of Concept

References

https://vuldb.com/vuln/404051
vdb-entrytechnical-description
https://vuldb.com/vuln/404051/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-91780
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)
VulDB CNA Team
.