HIGHCVSS v3.1 7.8Actively exploited · CISA KEV since 2025-10-06Vulnerability
CVE-2021-22555
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.
Properties
- Euvd product
- Linux kernel
- Vulnerability name
- Linux Kernel Heap Out-of-Bounds Write Vulnerability
- First seen
- 2025-12-30T20:32:33+00:00
- Cvss score
- 7.8
- Epss score
- 0.78684
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2025-10-27
- Euvd assigner
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2025-10-06T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2025-10-06
- Euvd base score version
- 3.1
- Score
- 7.8
- Fetched at
- 2026-10-20T10:36:20+00:00
- Cvss vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 8.3
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Related Entities (39 · showing 23)
AFFECTS_PRODUCT (36 · showing 20)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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