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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.

PUBLISHED Reserved 2026-04-13 | Published 2026-05-29 | Updated 2026-06-01 | Assigner VulnCheck




LOW: 1.0CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

LOW: 3.8CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L

Problem types

Stack-based Buffer Overflow

Product status

Default status
affected

Any version before 0.27.0-rc1
affected

Any version before 3f24f0b48a481a8cf2e46059d8238a283ddc1c13
affected

Credits

Nicholas Carlini of Anthropic finder

References

github.com/OpenSC/OpenSC/pull/3558 issue-tracking

github.com/...ommit/3f24f0b48a481a8cf2e46059d8238a283ddc1c13 patch

www.vulncheck.com/...w-via-piv-process-history-in-card-piv-c third-party-advisory

cve.org (CVE-2026-40510)

nvd.nist.gov (CVE-2026-40510)

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