CVE-2026-4395

LOW EPSS 26.3%
Published Mar 19, 20263mo ago · Modified Mar 26, 20263mo ago
1.3 CVSS 4.0
Low
Find Similar
Published Mar 19, 2026 3mo ago
Last Modified Mar 26, 2026 3mo ago

Description

Heap-based buffer overflow in the KCAPI ECC code path of wc_ecc_import_x963_ex() in wolfSSL wolfcrypt allows a remote attacker to write attacker-controlled data past the bounds of the pubkey_raw buffer via a crafted oversized EC public key point. The WOLFSSL_KCAPI_ECC code path copies the input to key->pubkey_raw (132 bytes) using XMEMCPY without a bounds check, unlike the ATECC code path which includes a length validation. This can be triggered during TLS key exchange when a malicious peer sends a crafted ECPoint in ServerKeyExchange.

CVSS Details

Base Score
1.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:D/RE:L/U:Amber
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
26.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-122

Affected Products 1

VendorProductVersionRange
wolfsslwolfssl* <5.9.0

References 1

  • github.com https://github.com/wolfSSL/wolfssl/pull/9988
    PatchIssue Tracking

Remediation

  • github.com https://github.com/wolfSSL/wolfssl/pull/9988
    PatchIssue Tracking