CVE-2026-10275

OpenSC pkcs11-tool Key Generation pkcs11-tool.c test_kpgen_certwrite buffer overflow

Assigner: VulDB
Reserved: 31.05.2026 Published: 01.06.2026 Updated: 01.06.2026

A flaw has been found in OpenSC up to 0.26.1. This affects the function test_kpgen_certwrite of the file src/tools/pkcs11-tool.c of the component pkcs11-tool Key Generation Module. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is indicated that the exploitability is difficult. The exploit has been published and may be used. Patch name: 814f745b3b6d100295f65f1935edd33d520d33ab. It is recommended to apply a patch to fix this issue.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CVSS Score: 2.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
CVSS Score: 5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

CVSS Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
CVSS Score: 5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.0

CVSS Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C
CVSS Score: 5.1

Access Vector	Network	Confidentiality Impact	Partial
Access Complexity	High	Integrity Impact	Partial
Authentication	None	Availability Impact	Partial

CVSS 2.0

Product Status

Vendor	n/a
Product	OpenSC
Versions	Version 0.26.0 is affected Version 0.26.1 is affected

Vendor

n/a

Product

OpenSC

Versions

Version 0.26.0 is affected
Version 0.26.1 is affected

Credits

Fantasy (VulDB User) reporter

References

Problem Types