---
schema_version: '1.0'
id: security-20260705-02bf21
url: https://osv.dev/vulnerability/DEBIAN-CVE-2026-42764
url_hash: 02bf21acb48e1a2c45923ca76303fa3e491b916c9581186dc57735c72cca7796
canonical_url: https://osv.dev/vulnerability/DEBIAN-CVE-2026-42764
source: osv:debian
category: security/os
category_raw: cve/os
region: null
tags:
- cve
- DEBIAN-CVE-2026-42764
- severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- openssl
- Debian
lang: en
published_at: '2026-06-09T17:17:07Z'
fetched_at: '2026-07-05T15:34:34Z'
updated_at: '2026-07-05T15:36:30Z'
status: published
content_hash: 1b8d97859adc087267cb6425c7a343b9005fda8b12cd8859db5373a3ad7f777c
license_note: full
summary: 'Issue summary: Receiving a QUIC initial packet with an invalid token may
  trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation
  disabled.  Impact summary: NULL pointer dereference typically causes abnormal termination
  of the affected QUIC server pro'
summary_source: rss
summary_en: 'Issue summary: Receiving a QUIC initial packet with an invalid token
  may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation
  disabled.  Impact summary: NULL pointer dereference typically causes abnormal termination
  of the affected QUIC server pro'
entities: []
key_facts: []
related: []
related_auto: []
title: DEBIAN-CVE-2026-42764 — openssl
---

# DEBIAN-CVE-2026-42764 — openssl

## TL;DR
Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled.  Impact summary: NULL pointer dereference typically causes abnormal termination of the affected QUIC server pro

## Key Points
- cve / DEBIAN-CVE-2026-42764 / severity:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H / openssl / Debian

## Details
**Severity:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
**Advisory:** DEBIAN-CVE-2026-42764

**Affected (your watchlist):**
- `Debian:openssl` 3.0.11-1~deb12u2 → no fixed version listed [rpi]

**Details:**
Issue summary: Receiving a QUIC initial packet with an invalid token may trigger a NULL pointer dereference in the OpenSSL QUIC server with address validation disabled.  Impact summary: NULL pointer dereference typically causes abnormal termination of the affected QUIC server process and a Denial of Service.  If the address validation is disabled in the OpenSSL QUIC server implementation, an attacker can crash the server by sending an initial packet with an invalid or expired token.  By default, the client address validation is enabled in the OpenSSL QUIC server implementation, which makes the default configuration not vulnerable to this issue. However if the SSL_LISTENER_FLAG_NO_VALIDATE is used with the SSL_new_listener() call, the address validation is disabled making the vulnerable code reachable.  The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.

**References:**
- https://security-tracker.debian.org/tracker/CVE-2026-42764

_Data: OSV.dev (upstream: debian) — https://osv.dev/vulnerability/DEBIAN-CVE-2026-42764_

## Source
元記事: [DEBIAN-CVE-2026-42764 — openssl](https://osv.dev/vulnerability/DEBIAN-CVE-2026-42764) — published 2026-06-09T17:17:07Z