Buffer Overflow Vulnerability in OpenSC's Key Generation Module
CVE-2026-10275

2.3LOW

Key Information:

Vendor

OpenSC

Status
Opensc
Vendor
CVE Published:
1 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-10275?

A buffer overflow vulnerability exists in the Key Generation Module of OpenSC's pkcs11-tool, specifically within the function test_kpgen_certwrite. This flaw allows for a potential remote exploitation, granting attackers the means to manipulate memory allocation and execute harmful code. The complexity of the attack remains elevated, making the exploit more challenging to carry out. Users are strongly advised to implement the provided patch (commit hash: 814f745b3b6d100295f65f1935edd33d520d33ab) to mitigate the associated risks.

Affected Version(s)

OpenSC 0.26.0

OpenSC 0.26.1

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-2026-10275 - Proof of Concept

References

https://vuldb.com/vuln/367568
vdb-entrytechnical-description
https://vuldb.com/vuln/367568/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-10275
third-party-advisory

CVSS V4

Score:
2.3
Severity:
LOW
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Fantasy (VulDB User)
.