Security
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CVE-2026-53266

HIGHCVSS 8.8Known Exploited
Description

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.

Timeline
Published:June 25th, 2026 9:16 AM
Last modified:September 19th, 2026 4:17 AM
Added to KEV:September 18th, 2026
CVSS Scoring

CVSS v3: 8.8 (HIGH)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected Software
From NVD CPE configuration data

Vendors

linux

Products

linux_kernel
Weaknesses (CWE)

Source: NIST NVD · Data may lag official sources by up to one minute