CISA KEV: CVE-2026-53266 — Linux Kernel actively exploited

Linux Kernel Out-of-Bounds Write Vulnerability. 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. Required action: Apply mitigations in accordance with ven