RHSA-2026:20580 - Security Advisory

トピック

An update for the squid:4 module is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

説明

Squid is a high-performance proxy caching server for web clients, supporting FTP, and HTTP data objects.

Security Fix(es):

• squid: Squid: Denial of Service via heap Use-After-Free vulnerability in ICP handling (CVE-2026-33526)
• Squid: Squid: Denial of Service via crafted ICP traffic (CVE-2026-32748)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

解決策

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

影響を受ける製品

• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.8 x86_64
• Red Hat Enterprise Linux Server - TUS 8.8 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.8 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.8 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle Long Life 8.8 ppc64le

修正

• BZ - 2451574 - CVE-2026-33526 squid: Squid: Denial of Service via heap Use-After-Free vulnerability in ICP handling
• BZ - 2451577 - CVE-2026-32748 Squid: Squid: Denial of Service via crafted ICP traffic

CVE

• CVE-2026-32748
• CVE-2026-33526

参考資料

• https://access.redhat.com/security/updates/classification/#important