Page generated: 11 Nov 2026, 05:56 UTC
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CVE-2015-3246

libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue…

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libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.
CVSS 7.4 (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 7.4: +1.11
  • Fresh EPSS: 8.50%: +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: 11 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

Ubuntu security notices
Technical advisory · 03 Nov 2026, 17:36 · USN-8987-1: libuser vulnerabilities
shattered.io
Press · 27 Sep 2026, 07:00 · CISA KEV Adds 2 CVEs as BOD 26-04 Cuts Deadline [2026] - shattered.io
shattered.io
Press · 22 Sep 2026, 10:30 · CISA Adds 6 Exploited Flaws to KEV, Feds Get 3 Days [2026] - shattered.io
Recorded Future
Press · 08 Sep 2026, 07:00 · August 2026 CVE Landscape - Recorded Future
Recorded Future
Press · 08 Sep 2026, 07:00 · Panorama des CVE d'août 2026​​ - Recorded Future
See all 11 source documents
Security Affairs
Press · 28 Aug 2026, 07:00 · U.S. CISA adds Red Hat, Linux Kernel, Ajax.NET Professional, Microsoft SQL Server, and Citrix NetScaler fla... - Security Affairs
Cybernews
Press · 28 Aug 2026, 07:00 · Linux flaws drive CISA’s latest exploited bug list - Cybernews
Help Net Security
Press · 27 Aug 2026, 07:00 · Previously patched Citrix NetScaler flaw exploited in the wild (CVE-2026-8452) - Help Net Security
The Hacker News
Press · 27 Aug 2026, 07:00 · CISA Adds Six Exploited Flaws to KEV, Including NetScaler, Linux, and SQL Server Bugs - The Hacker News
Infosecurity Magazine
Press · 27 Aug 2026, 07:00 · CISA Warns of Six Exploited Flaws in Microsoft, Linux, Red Hat and Citrix Products - Infosecurity Magazine
The Hacker News
Press · 24 Aug 2026, 07:00 · UAT-10147 Uses AI to Scale Server Attacks, Deploys SPECTRE With EDR Bypass and Linux Rootkit - 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 15:12). The curve appears once the score changes.

Public exploit evidence

2

Public exploit entries / repo candidates

Source entries and unverified repository candidates are counted separately.

Public exploit evidence
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 7.4; EPSS 8.5%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, no prior privileges, no user interaction, additional attack conditions.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:39.719437+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
11 Aug 2015, 14:00
First press mention
24 Aug 2026, 07:00
Added to the CISA KEV catalog
26 Aug 2026, 00:00
Latest press mention
27 Sep 2026, 07:00
Score calculated
05 Nov 2026, 13:57
PoCs on GitHub
2 repositories