CVE-2026-46300：Linux Kernel Missing Initialization of a Variable Vulnerability

Linux Kernel contains a missing initialization of a variable vulnerability that could allow for unintended modification of page-cache-backed data via failure to preserve the shared-fragment marker during socket buffer coalescing, causing ESP input processing to decrypt shared fragments in place. This vulnerability can be chained with CVE-2026-109618 and CVE-2026-109619 to implant PHP webshells and run commands as root.

漏洞信息

• CVE 编号：CVE-2026-46300
• 厂商 / 产品：Linux / Kernel
• 加入 KEV 时间：2026-10-28
• 修复期限：2026-10-31
• 勒索软件利用：暂未发现

处置建议

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

弱点类型

CWE-456

参考链接

• NVD 漏洞详情
• CISA 已知被利用漏洞目录

该漏洞已被 CISA 确认在野利用，请优先处置。

原文链接： CVE-2026-46300：Linux Kernel Missing Initialization of a Variable Vulnerability