Page generated: 11 Nov 2026, 06:04 UTC
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CVE-2023-0386

A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a loca…

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A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.
CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.2/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.8: +1.17
  • Fresh EPSS: 7.88%: +0.04

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

CyberSecurityNews
Press · 13 Jan 2026, 08:00 · Microsoft Patch Tuesday January 2026 – 114 Vulnerabilities Fixed Including 3 Zero-days - CyberSecurityNews
Armis, The Cyber Exposure Management & Security Company
Press · 07 Aug 2025, 20:22 · CVE-2023-0386: Linux kernel OverlayFS - Privilege Escalation Vulnerability - Armis, The Cyber Exposure Management & Security Company
SOCRadar
Press · 19 Jun 2025, 07:00 · How CVE-2025-6018 and CVE-2025-6019 Enable Full Root Access on Linux - SOCRadar
Field Effect
Press · 19 Jun 2025, 07:00 · Two public exploits for Linux, one observed in the wild - Field Effect
SecurityWeek
Press · 18 Jun 2025, 07:00 · Linux Security: New Flaws Allow Root Access, CISA Warns of Old Bug Exploitation - SecurityWeek
See all 10 source documents
The Hacker News
Press · 18 Jun 2025, 07:00 · CISA Warns of Active Exploitation of Linux Kernel Privilege Escalation Vulnerability - The Hacker News
LinkedIn
Press · 18 Jun 2025, 07:00 · CISA Issues Alert On Ongoing Exploitation of Linux Privilege Escalation Flaw - LinkedIn
BleepingComputer
Press · 18 Jun 2025, 07:00 · CISA warns of attackers exploiting Linux flaw with PoC exploit - BleepingComputer
wiz.io
Press · 27 Jul 2023, 07:00 · GameOverlay Vulnerability Impacts 40% of Ubuntu Workloads | Wiz Blog - wiz.io
The Hacker News
Press · 27 Jul 2023, 07:00 · GameOver(lay): Two Severe Linux Vulnerabilities Impact 40% of Ubuntu Users - The Hacker News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.2 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

2

Public exploit entries / repo candidates

See 2 repos with metrics
RepositoryStarsForksLanguageUpdated
dragosbanica/CVE-2023-0386_POC00C20 Jan 2026, 18:06
huovnn/CVE-2023-0386-go-poc00Go07 Feb 2026, 11:30
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.8; EPSS 7.9%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, low privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:48.602448+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
22 Mar 2023, 00:00
First press mention
27 Jul 2023, 07:00
Added to the CISA KEV catalog
17 Jun 2025, 00:00
Latest press mention
13 Jan 2026, 08:00
Score calculated
05 Nov 2026, 13:58
PoCs on GitHub
2 repositories