CVE-2026-46300 — Vulnerability intelligence

Linux — Kernel

Published: 2026-05-23T11:44:02.231Z

CVSS

7.8

CISA KEV

Known exploitation

Original source text (not a translation)

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.

Sources

• Linux Kernel Missing Initialization of a Variable Vulnerability
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• Original advisory
• CVE-2026-46300