Heap-based Buffer Overflow Affecting wolfssl package, versions [0,]
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.
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Start learning- Snyk IDSNYK-CONAN-WOLFSSL-15855396
- published31 Mar 2026
- disclosed19 Mar 2026
- creditHaruto Kimura
Introduced: 19 Mar 2026
NewCVE-2026-4395 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the wc_ecc_import_x963_ex() function when handling EC public key points in the KCAPI ECC code path. An attacker can cause memory corruption and potentially execute arbitrary code by sending a crafted oversized EC public key point during a TLS key exchange.
Note:
This is only exploitable if the library is built with the WOLFSSL_KCAPI_ECC define enabled.