CVE

CVE-2021-22555

Linux Kernel Heap Out-of-Bounds Write Vulnerability

Linux · Kernel

Date added (CISA)

2025-10-06

Remediation due

2025-10-27

Known ransomware use

Not indicated

Remediation priority

P2 — past CISA due date

Associated with

Related to

Lazarus Group (TraderTraitor cluster) / APT38 / BlueNoroff · SPECTREcampaignCorrelated cluster2026-09-16
Lazarus Group (TraderTraitor cluster) / APT38 / BlueNoroff · ZshBucketcampaignCorrelated cluster2026-08-26
BadIIScampaignCorrelated cluster2026-08-26

ATT&CK mapping

No ATT&CK mapping yet

The CTID Mappings Explorer hasn't published an exploitation/impact technique mapping for this CVE yet.