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CVE-2026-3849

Опубликовано: 19 мар. 2026
Источник: ubuntu
Приоритет: medium
EPSS Низкий
CVSS3: 9.8

Описание

Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.

РелизСтатусПримечание
devel

needs-triage

esm-apps/bionic

needs-triage

esm-apps/focal

needs-triage

esm-apps/jammy

needs-triage

esm-apps/noble

needs-triage

esm-apps/xenial

needs-triage

jammy

needs-triage

noble

needs-triage

questing

needs-triage

upstream

needs-triage

Показывать по

EPSS

Процентиль: 42%
0.00199
Низкий

9.8 Critical

CVSS3

Связанные уязвимости

CVSS3: 9.8
nvd
27 дней назад

Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.

msrc
22 дня назад

Buffer Overflow in HPKE via Oversized ECH Config

CVSS3: 9.8
debian
27 дней назад

Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Confi ...

CVSS3: 9.8
github
27 дней назад

Stack Buffer Overflow in wc_HpkeLabeledExtract via Oversized ECH Config. A vulnerability existed in wolfSSL 5.8.4 ECH (Encrypted Client Hello) support, where a maliciously crafted ECH config could cause a stack buffer overflow on the client side, leading to potential remote execution and client program crash. This could be exploited by a malicious TLS server supporting ECH. Note that ECH is off by default, and is only enabled with enable-ech.

EPSS

Процентиль: 42%
0.00199
Низкий

9.8 Critical

CVSS3