[悪用確認] CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability

Linux Kernel Linux Kernel contains an out-of-bounds write vulnerability in the ebtables SNAT target which allows an ARP sender hardware address rewrite to write directly into a nonlinear socket-buffer fragment backed by a splice-imported file page. The impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version. 対応: 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. (期限 2026-09-21)

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2026/09/18 09:00，CISA Known Exploited Vulnerabilities 发布了“[悪用確認] CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability”（类型：漏洞公告）。严重程度为“严重”（critical）。CVE：CVE-2026-53266。