CVE-2021-1048 CISA KEV · Actively exploited

kernel: Use After Free in epoll_loop_check_proc() which could result in a local privilege escalation

CVSS score

7.8

EPSS probability

%1.1

Risk score

0.2

Published

5 y ago

Vulnerability Timeline (Change History)

CVE-2021-1048 historical changes made to the vulnerability by NVD, CISA and MITRE:

Date	Actor / Source	Action / Description	Type	Previous value	New value
21.11.2025	nvd@nist.gov	Initial Analysis & CVSS Vector Assignment	CVSS V3.1	—	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
23.05.2022	CISA Coordinator	Added to KEV Catalog (Active Exploitation)	SSVC / KEV	exploitation: none	exploitation: active
02.09.2021	MITRE / NVD	New CVE Record Received & Ingested	CVE Created	—	CVE-2021-1048

5.3

Workaround Public Exploits:9EPSS %727 y ago

7.8

Workaround Public Exploits:1EPSS %32 y ago

7.8

WorkaroundEPSS %010 mo ago

5.5

Patch verifiedEPSS %010 mo ago

Workaround Public Exploits:1EPSS %11 y ago

WorkaroundEPSS %11 y ago

Affected products, version ranges, exploitation status and patch information in a single request, with a free key.

curl -H "x-api-key: $DAYBREACH_API_KEY" \
  "https://api.daybreach.dev/api/v1/intel/cves/CVE-2021-1048"