CVE-2026-42764

描述

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.

如何修補 CVE-2026-42764

要修補 CVE-2026-42764,請將受影響套件升級到下列已修補版本。

• —升級至 3.5.7-r0 或更新版本
• —升級至 3.5.6-1~deb13u2 或更新版本

CVE-2026-42764 正在被利用嗎?

目前沒有被利用訊號。CVE-2026-42764 既不在 CISA KEV 也沒有最新的 EPSS 分數。

受影響套件(2)

• from 0, < 3.5.7-r0
• from 0, < 3.5.6-1~deb13u2

CVSS 分數

參考連結(2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2026-42764
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-42764