CVE-2026-10275 | OpenSC up to 0.26.1 pkcs11-tool Key Generation src/tools/pkcs11-tool.c test_kpgen_certwrite buffer overflow (Issue 3682 / Nessus ID 323240)

A vulnerability marked as critical has been reported 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. This vulnerability is tracked as CVE-2026-10275. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is recommended to apply a patch to fix this issue.