Memory Corruption Vulnerability in libvmdk by libyal
CVE-2026-123268

5.1MEDIUM

Key Information:

Vendor

Libyal

Status
Libvmdk
Vendor
CVE Published:
5 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-123268?

A security flaw in libyal's libvmdk component, specifically within the Extent Data File Handler, allows for memory corruption due to improper handling in the libvmdk_extent_table_get_extent_data_file_path function. This vulnerability can be exploited remotely, posing a significant risk to users. Given its rolling release model, the product continuously updates without specific version tracking; however, a patch has been identified to resolve the issue. Applying the recommended patch is crucial for safeguarding systems against potential exploitation.

Affected Version(s)

libvmdk 3fdd7839758e9f44ef95e1dfccde8552b860a4fc

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-2026-123268 - Proof of Concept

References

https://vuldb.com/vuln/431574
vdb-entrytechnical-description
https://vuldb.com/vuln/431574/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-123268
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

fczhang (VulDB User)
.