CVE-2026-40510

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

State: Published
Severity: 1.0 Low
Published: May 29, 2026
Updated: Jul 14, 2026
Reserved: Apr 13, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	1.0 Low	CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	3.8 Low	CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L	VulnCheck

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
OpenSCOpenSC	before 0.27.0-rc1Affected before 3f24f0b48a481a8cf2e46059d8238a283ddc1c13Affected

References

https://github.com/OpenSC/OpenSC/pull/3558issue-tracking
https://github.com/OpenSC/OpenSC/commit/3f24f0b48a481a8cf2e46059d8238a283ddc1c13patch
https://www.vulncheck.com/advisories/opensc-stack-buffer-overflow-via-piv-process-history-in-card-piv-cthird-party-advisory

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