CVE-2021-22555CISA KEVEPSS p99.5%

CVE-2021-22555Linux Kernel Heap Out-of-Bounds Write Vulnerability

Linux / Kernel

Description

Linux Kernel contains a heap out-of-bounds write vulnerability that could allow an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space.

Scoring

EPSS78.68% probability of exploitation · percentile 99.5% · 2026-06-18T12:00:27Z

CISA KEV entry

Added to KEV: 2025-10-06

(incoming)1

TypeTargetConfidenceTier
KEVEntryLinux Kernel Heap Out-of-Bounds Write Vulnerabilitykev-cve-2021-225550%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
Linux Kernel Heap-Based Buffer Overflow Vulnerability
CVE
Linux Kernel Privilege Escalation Vulnerability
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Linux Kernel Out-of-Bounds Access Vulnerability
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Linux Kernel Use-After-Free Vulnerability
CVE
Linux Kernel Out-of-Bounds Read Vulnerability
CVE
CVE-2023-0266
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.