CVE-2025-66215

Name	CVE-2025-66215
Description	OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, an attacker with physical access to the computer at the time user or administrator uses a token can cause a stack-buffer-overflow WRITE in card-oberthur. The attack requires crafted USB device or smart card that would present the system with specially crafted responses to the APDUs. This issue has been patched in version 0.27.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
opensc (PTS)	bullseye	0.21.0-1	vulnerable
	bullseye (security)	0.21.0-1+deb11u1	vulnerable
	bookworm	0.23.0-0.3+deb12u2	vulnerable
	trixie	0.26.1-2	vulnerable
	forky, sid	0.27.0~rc2-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
opensc	source	(unstable)	0.27.0~rc1-1

Notes

https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5fc-cw56-hwp2
https://github.com/OpenSC/OpenSC/pull/3436
https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66215
Fixed by: https://github.com/OpenSC/OpenSC/commit/a4bbf8a631537a4c0083b264095ed1cd36d307ab (0.27.0-rc1)
Fixed by: https://github.com/OpenSC/OpenSC/commit/56bc5e9575965461d99a274be45d71c18ab6eae0 (0.27.0-rc1)