Buffer Overflow in GNU Binutils ld Function Cache_bwrite
CVE-2026-90801

4.8MEDIUM

Key Information:

Vendor

Gnu
Status
Binutils
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90801?

A security vulnerability has been identified in GNU Binutils version 2.47 which affects the ld component's cache_bwrite function located in bfd/cache.c. This vulnerability arises from improper handling of the argument 'nbytes', leading to a buffer overflow condition. Exploiting this flaw requires local access to the system, and since the exploit has been made publicly available, it poses a significant risk to affected systems. Despite an early notification through a bug report, no corrective action has been taken by the project maintainers thus far.

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-2026-90801 - Proof of Concept

References

https://vuldb.com/vuln/403303
vdb-entrytechnical-description
https://vuldb.com/vuln/403303/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90801
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
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

Dem0000000 (VulDB User)
VulDB CNA Team
.