CVE-2021-3982

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-04-30. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Linux distributions using CAP_SYS_NICE for gnome-shell may be exposed to a privilege escalation issue. An attacker, with low privilege permissions, may take advantage of the way CAP_SYS_NICE is currently implemented and eventually load code to increase its process scheduler priority leading to possible DoS of other services running in the same machine.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
20.6%
KEV
Not listed

Published

April 29, 2022

Last Modified

November 21, 2024

References (4)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:06 UTCEPSS rescore
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  73. 2026-05-25 23:02 UTCEG score recompute
  74. 2026-05-25 23:02 UTCGHSA enrichment
  75. 2026-05-25 06:07 UTCOSV refresh

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Frequently asked(5)

What is CVE-2021-3982?
CVE-2021-3982 is a medium vulnerability published on April 29, 2022. Linux distributions using CAPSYSNICE for gnome-shell may be exposed to a privilege escalation issue. An attacker, with low privilege permissions, may take advantage of the way CAPSYSNICE is currently implemented and eventually load code to increase its process scheduler priority leading to possible…
When was CVE-2021-3982 disclosed?
CVE-2021-3982 was first published in the National Vulnerability Database on April 29, 2022, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-3982 actively exploited?
CVE-2021-3982 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 20.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-3982?
CVE-2021-3982 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2021-3982?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3982, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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