CVE-2026-10275

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

CVSS 2.3 LOWEPSS 0.3%CWE-119 CWE-120

Vexday Risk Score

28Low

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 2.3EPSS 0.3%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado

Lifecycle

01 Jun 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

n/a · OpenSC

public PoCs found — 1

cve_referencepan.baidu.com/s/1nrZPKDz2eAcCpsaFiIRlrgunverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://github.com/OpenSC/OpenSC/https://github.com/OpenSC/OpenSC/commit/814f745b3b6d100295f65f1935edd33d520d33ab https://github.com/OpenSC/OpenSC/issues/3682 https://github.com/OpenSC/OpenSC/pull/3684 https://pan.baidu.com/s/1nrZPKDz2eAcCpsaFiIRlrg https://vuldb.com/cve/CVE-2026-10275 https://vuldb.com/submit/825403 https://vuldb.com/vuln/367568 https://vuldb.com/vuln/367568/cti