CVE-2025-66038

A flaw was found in OpenSC, an open-source smart card tools and middleware. The sc_compacttlv_find_tag function, which searches compact-TLV (Tag-Length-Value) buffers, does not adequately verify the claimed value length against the remaining buffer size. This vulnerability allows attackers to provide specially crafted untrusted data, such as from smart cards or files, to influence the function to return pointers outside of the intended memory boundaries. Subsequent attempts to dereference these out-of-bounds pointers can lead to memory corruption, potentially impacting the stability and integrity of the system.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.