CVE-2026-79617Public exploit

Local desktop takeover via broad X11 authorization

Published Sep 9, 2026 · Updated Sep 9, 2026

Incorrect X11 access control in Pardus LightDM Greeter before 0.4.15 allows local users to access the active desktop display. At greeter startup, src/main.py runs xhost +local:, authorizing every local process to connect without the desktop user's Xauthority cookie. A low-privilege account on the same host can capture the desktop and inject GUI input, exposing and modifying the logged-in user's session.

CVSS severity7.1
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect X11 access control in Pardus LightDM Greeter before 0.4.15 allows local users to access the active desktop display. At greeter startup, src/main.py runs xhost +local:, authorizing every local process to connect without the desktop user's Xauthority cookie. A low-privilege account on the same host can capture the desktop and inject GUI input, exposing and modifying the logged-in user's session.

The record

CVE
CVE-2026-79617
Published
Sep 9, 2026
Updated
Sep 9, 2026
Vendor
TÜBİTAK BİLGEM Software Technologies Research Institute
Product
Pardus LightDM Greeter
Classifications
CWE-732, CAPEC-180, T1113
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.4.15

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

TÜBİTAK BİLGEM Software Technologies Research Institute · Pardus LightDM Greeterversion=0 <0.4.15

Published CVSS scores

7.1TR-CERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1113Screen Capture

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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