PT-2026-26368 · Wolfssl · Wolfssl Wolfcrypt

Haruto Kimura · Publicado 2026-03-19 · Atualizado 2026-03-22 · CVE-2026-4395

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Crítica

Vetor base

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions wolfSSL wolfcrypt (affected versions not specified)

Description A heap-based buffer overflow exists in the KCAPI ECC code path within the wc ecc import x963 ex() function. This allows a remote attacker to write data beyond the allocated buffer of the pubkey raw variable via a crafted, oversized EC public key point. The issue occurs because the WOLFSSL KCAPI ECC code path uses XMEMCPY without validating the input length, unlike the ATECC code path. This can be triggered during TLS key exchange when a malicious peer sends a crafted ECPoint in ServerKeyExchange.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Heap Based Buffer Overflow

Enumeração de Fraquezas

CWE-122

Identificadores relacionados

CVE-2026-4395

Produtos afetados

Wolfssl Wolfcrypt

Referências · 10

• https://github.com/wolfSSL/wolfssl/pull/9988 · Correção
• https://ubuntu.com/security/CVE-2026-4395 · Aviso do Fabricante
• https://security-tracker.debian.org/tracker/CVE-2026-4395 · Aviso do Fabricante
• https://nvd.nist.gov/vuln/detail/CVE-2026-4395 · Nota de Segurança
• https://twitter.com/VulmonFeeds/status/2034757097577951630 · Publicação no Twitter
• https://twitter.com/infoflowcloud/status/2035627951354421428 · Publicação no Twitter
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-4395 · Aviso do Fabricante
• https://cve.org/CVERecord?id=CVE-2026-4395 · Nota de Segurança
• https://twitter.com/CVEnew/status/2035627059376967723 · Publicação no Twitter
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-4395 · Aviso do Fabricante