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CVE-2025-13763

Libopensc: opensc: multiple uses of uninitialized variable

Multiple uses of uninitialized variables were found in libopensc that may lead to information disclosure or application crash. An attack requires a crafted USB device or smart card that would present the system with specially crafted responses to the APDUs

CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed
Vendors
Opensc Redhat
Products
Opensc Enterprise Linux Rhel Els
CVE-2026-103531

OpenSC card-setcos.c setcos_construct_fci_44 stack-based overflow

A flaw has been found in OpenSC up to 0.27.1. The impacted element is the function setcos_construct_fci_44 of the file src/libopensc/card-setcos.c. Executing a manipulation of the argument type_attr can lead to stack-based buffer overflow. The attack can be launched remotely. This patch is called ad730304052937c32b4eb489a06835ac6123632c. It is best practice to apply a patch to resolve this issue.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Opensc
Products
Opensc
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-2026-10275

OpenSC pkcs11-tool Key Generation pkcs11-tool.c test_kpgen_certwrite buffer overflow

A flaw has been found in OpenSC up to 0.26.1. This affects the function test_kpgen_certwrite of the file src/tools/pkcs11-tool.c of the component pkcs11-tool Key Generation Module. This manipulation causes buffer overflow. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is indicated that the exploitability is difficult. The exploit has been published and may be used. Patch name: 814f745b3b6d100295f65f1935edd33d520d33ab. It is recommended to apply a patch to fix this issue.

CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Opensc
Products
Opensc
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