Local Null Pointer Dereference Vulnerability in GNU Binutils by GNU
CVE-2026-91779

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Binutils
Vendor
CVE Published:
15 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-91779?

A security flaw has been identified in GNU Binutils 2.47, specifically in the function responsible for handling EH Frames. This vulnerability allows local attackers to exploit a null pointer dereference, potentially leading to application crashes or unexpected behaviors. The issue originated from unhandled manipulations in the source code file bfd/elf-eh-frame.c. The exploit for this vulnerability has been made public, highlighting the urgent need for mitigation. Despite the detection of this flaw through a bug report, the project maintainers have yet to respond or patch the issue.

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-2026-91779 - Proof of Concept

References

https://vuldb.com/vuln/404050
vdb-entrytechnical-description
https://vuldb.com/vuln/404050/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-91779
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
.