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CVE-2023-4535

Opensc: out-of-bounds read in myeid driver handling encryption using symmetric keys

An out-of-bounds read vulnerability was found in OpenSC packages within the MyEID driver when handling symmetric key encryption. Exploiting this flaw requires an attacker to have physical access to the computer and a specially crafted USB device or smart card. This flaw allows the attacker to manipulate APDU responses and potentially gain unauthorized access to sensitive data, compromising the system's security.

CVSS 3.1 · 4.5 Medium EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Opensc Project Redhat
Products
Fedora Opensc Enterprise Linux and 1 more
CVE-2023-40661

Opensc: multiple memory issues with pkcs15-init (enrollment tool)

Several memory vulnerabilities were identified within the OpenSC packages, particularly in the card enrollment process using pkcs15-init when a user or administrator enrolls cards. To take advantage of these flaws, an attacker must have physical access to the computer system and employ a custom-crafted USB device or smart card to manipulate responses to APDUs. This manipulation can potentially allow compromise key generation, certificate loading, and other card management operations during enrollment.

CVSS 3.1 · 5.4 Medium EPSS 1.3% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2023-40660

Opensc: potential pin bypass when card tracks its own login state

A flaw was found in OpenSC packages that allow a potential PIN bypass. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. This issue poses a security risk, particularly for OS logon/screen unlock and for small, permanently connected tokens to computers. Additionally, the token can internally track login status. This flaw allows an attacker to gain unauthorized access, carry out malicious actions, or compromise the system without the user's awareness.

CVSS 3.1 · 6.6 Medium EPSS 1.0% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-8443

Libopensc: heap buffer overflow in openpgp driver when generating key

A heap-based buffer overflow vulnerability was found in the libopensc OpenPGP driver. A crafted USB device or smart card with malicious responses to the APDUs during the card enrollment process using the `pkcs15-init` tool may lead to out-of-bound rights, possibly resulting in arbitrary code execution.

CVSS 3.1 · 2.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-45620

Libopensc: incorrect handling of the length of buffers or files in pkcs15init

A vulnerability was found in the pkcs15-init tool in OpenSC. An attacker could use a crafted USB Device or Smart Card, which would present the system with a specially crafted response to APDUs. When buffers are partially filled with data, initialized parts of the buffer can be incorrectly accessed.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-45619

Libopensc: incorrect handling length of buffers or files in libopensc

A vulnerability was found in OpenSC, OpenSC tools, PKCS#11 module, minidriver, and CTK. An attacker could use a crafted USB Device or Smart Card, which would present the system with a specially crafted response to APDUs. When buffers are partially filled with data, initialized parts of the buffer can be incorrectly accessed.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-45618

Libopensc: uninitialized values after incorrect or missing checking return values of functions in pkcs15init

A vulnerability was found in pkcs15-init in OpenSC. An attacker could use a crafted USB Device or Smart Card, which would present the system with a specially crafted response to APDUs. Insufficient or missing checking of return values of functions leads to unexpected work with variables that have not been initialized.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-45617

Libopensc: uninitialized values after incorrect or missing checking return values of functions in libopensc

A vulnerability was found in OpenSC, OpenSC tools, PKCS#11 module, minidriver, and CTK. An attacker could use a crafted USB Device or Smart Card, which would present the system with a specially crafted response to APDUs. Insufficient or missing checking of return values of functions leads to unexpected work with variables that have not been initialized.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-45616

Libopensc: uninitialized values after incorrect check or usage of apdu response values in libopensc

A vulnerability was found in OpenSC, OpenSC tools, PKCS#11 module, minidriver, and CTK. An attacker could use a crafted USB Device or Smart Card, which would present the system with a specially crafted response to APDUs. The following problems were caused by insufficient control of the response APDU buffer and its length when communicating with the card.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-45615

Libopensc: pkcs15init: usage of uninitialized values in libopensc and pkcs15init

A vulnerability was found in OpenSC, OpenSC tools, PKCS#11 module, minidriver, and CTK. The problem is missing initialization of variables expected to be initialized (as arguments to other functions, etc.).

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2024-1454

Opensc: memory use after free in authentic driver when updating token info

The use-after-free vulnerability was found in the AuthentIC driver in OpenSC packages, occuring in the card enrolment process using pkcs15-init when a user or administrator enrols or modifies cards. An attacker must have physical access to the computer system and requires a crafted USB device or smart card to present the system with specially crafted responses to the APDUs, which are considered high complexity and low severity. This manipulation can allow for compromised card management operations during enrolment.

CVSS 3.1 · 3.4 Low EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Opensc Project Redhat
Products
Fedora Opensc Enterprise Linux and 1 more
CVE-2023-5992

Opensc: side-channel leaks while stripping encryption pkcs#1 padding

A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is not implemented as side-channel resistant. This issue may result in the potential leak of private data.

CVSS 3.1 · 5.6 Medium EPSS 1.2% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux Enterprise Linux Eus and 9 more
CVE-2026-40510

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

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.

CVSS 4.0 · 1 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Opensc Project
Products
Opensc Opensc
CVE-2026-40528

OpenSC < 0.27.0 Buffer Overrun in do_key_value() via profile.c

OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory by supplying a crafted profile configuration file. During pkcs15-init invocation, a key value entry beginning with '=' followed by more than sizeof(keybuf) characters is copied into keybuf via memcpy without a length check, causing both stack and heap buffer overruns.

CVSS 4.0 · 1 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Opensc Project
Products
Opensc Opensc
CVE-2025-24531

pam_pkcs11: authentication bypass in error situations

In OpenSC pam_pkcs11 before 0.6.13, pam_sm_authenticate() wrongly returns PAM_IGNORE in many error situations (such as an error triggered by a smartcard before login), allowing authentication bypass.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Vendors
Opensc Project
Products
Opensc Pam Pkcs11
CVE-2025-49010

OpenSC: Stack-buffer-overflow WRITE in GET RESPONSE

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 GET RESPONSE. 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.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Opensc Project
Products
Opensc Opensc
CVE-2025-66037

OpenSC: Out of Bounds vulnerability

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, feeding a crafted input to the fuzz_pkcs15_reader harness causes OpenSC to perform an out-of-bounds heap read in the X.509/SPKI handling path. Specifically, sc_pkcs15_pubkey_from_spki_fields() allocates a zero-length buffer and then reads one byte past the end of that allocation. This issue has been patched in version 0.27.0.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Opensc Project
Products
Opensc Opensc
CVE-2025-66038

OpenSC: `sc_compacttlv_find_tag` can return out-of-bounds pointers

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sc_compacttlv_find_tag searches a compact-TLV buffer for a given tag. In compact-TLV, a single byte encodes the tag (high nibble) and value length (low nibble). With a 1-byte buffer {0x0A}, the encoded element claims tag=0 and length=10 but no value bytes follow. Calling sc_compacttlv_find_tag with search tag 0x00 returns a pointer equal to buf+1 and outlen=10 without verifying that the claimed value length fits within the remaining buffer. In cases where the sc_compacttlv_find_tag is provided untrusted data (such as being read from cards/files), attackers may be able to influence it to return out-of-bounds pointers leading to downstream memory corruption when subsequent code tries to dereference the pointer. This issue has been patched in version 0.27.0.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Opensc Project
Products
Opensc Opensc
CVE-2025-66215

OpenSC: Stack-buffer-overflow WRITE in card-oberthur

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.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Vendors
Opensc Opensc Project
Products
Opensc Opensc
CVE-2023-2977

opensc: buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package

A vulnerbility was found in OpenSC. This security flaw cause a buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package. The attacker can supply a smart card package with malformed ASN1 context. The cardos_have_verifyrc_package function scans the ASN1 buffer for 2 tags, where remaining length is wrongly caculated due to moved starting pointer. This leads to possible heap-based buffer oob read. In cases where ASAN is enabled while compiling this causes a crash. Further info leak or more damage is possible.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Vendors
Opensc Project Redhat
Products
Opensc Enterprise Linux