Buffer Over-read Affecting opensc/opensc package, versions [,0.27.0-rc1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-OPENSCOPENSC-15857160
- published31 Mar 2026
- disclosed30 Mar 2026
- credithgarrereyn
Introduced: 30 Mar 2026
CVE-2025-66038 (opens in a new tab)How to fix?
Upgrade opensc/opensc to version 0.27.0-rc1 or higher.
Overview
Affected versions of this package are vulnerable to Buffer Over-read in the sc_compacttlv_find_tag function. An attacker can cause memory corruption or potentially execute arbitrary code by supplying specially crafted compact-TLV buffers that claim a value length exceeding the actual buffer size, leading to out-of-bounds pointer returns and subsequent unsafe memory access.