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CVE-2026-40510— OpenSC < 0.27.0-rc1 Stack Buffer Overflow via piv_process_history() in card-piv.c

Quick assessment

Affected
OpenSC OpenSC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenSC是OpenSC开源的一款开源的智能卡工具和中间件。 OpenSC 0.27.0-rc1之前版本存在安全漏洞，该漏洞源于src/libopensc/card-piv.c中的piv_process_history()函数存在栈缓冲区溢出漏洞，允许物理存在的攻击者通过提供特制的PIV智能卡或USB设备，在Key History Object ASN.1响应中返回超过118字节的URL字段，从而触发内存损坏。

CVSS 3.8 · Low EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 2

VendorProduct Version RangeStatus
OpenSC OpenSC < 0.27.0-rc1 affected
< 3f24f0b48a481a8cf2e46059d8238a283ddc1c13 affected
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I. Basic Information for CVE-2026-40510

Vulnerability Information
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Vulnerability Title
OpenSC < 0.27.0-rc1 Stack Buffer Overflow via piv_process_history() in card-piv.c
Source: CVE Program / CVE List V5
Vulnerability Description
OpenSC before 0.27.0-rc1, fixed in commit 3f24f0b, contains a stack buffer overflow vulnerability in piv_process_history() in src/libopensc/card-piv.c that allows physically present attackers to trigger memory corruption by presenting a crafted PIV smart card or USB device returning a URL field longer than 118 bytes in the Key History Object ASN.1 response.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
OpenSC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenSC是OpenSC开源的一款开源的智能卡工具和中间件。 OpenSC 0.27.0-rc1之前版本存在安全漏洞，该漏洞源于src/libopensc/card-piv.c中的piv_process_history()函数存在栈缓冲区溢出漏洞，允许物理存在的攻击者通过提供特制的PIV智能卡或USB设备，在Key History Object ASN.1响应中返回超过118字节的URL字段，从而触发内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenSC OpenSC 0 ~ 0.27.0-rc1 -

II. Public POCs for CVE-2026-40510

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III. Intelligence Information for CVE-2026-40510

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Patches & Fixes for CVE-2026-40510 (2)

Vendor Advisories for CVE-2026-40510 (1)

IV. Related Vulnerabilities

Same product: OpenSC
Same vendor: OpenSC
Same weakness: CWE-121

V. Comments for CVE-2026-40510

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