Skip to main content
Threat Radar animated logo
DashboardThreatsMapFeedsPricingView Plans & Pricing
reconnecting
Press slash or control plus K to focus the search. Use the arrow keys to navigate results and press enter to open a threat.
Reconnecting to live updates…

A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining… (CVE-2026-68743)

0
Medium
VulnerabilityCVE-2026-68743gcveosvubuntu-cve-2026-68743cve-2026-68743ubuntu-16-04-ltsubuntu-18-04-ltsubuntu-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-26-04-lts
Published: 08/04/2026 (08/04/2026, 19:16:00 UTC)
Source: GCVE Database
Product: sssd

Description

A flaw was found in SSSD. The extract_authtok_v1() function in the PAM responder does not validate the auth_token_length field against the remaining buffer size before processing. A local attacker can exploit this via a crafted protocol v1 request to the PAM responder socket, causing an out-of-bounds read and process crash, resulting in a denial of service.

CVSS v3.1

Score 7.1high

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=xenial
Affected versions
=1.12.5-2=1.13.1-2=1.13.2-1=1.13.3-1=1.13.4-1=1.13.4-1ubuntu1=1.13.4-1ubuntu1.1=1.13.4-1ubuntu1.2=1.13.4-1ubuntu1.5=1.13.4-1ubuntu1.6=1.13.4-1ubuntu1.7=1.13.4-1ubuntu1.8=1.13.4-1ubuntu1.9=1.13.4-1ubuntu1.10=1.13.4-1ubuntu1.11=1.13.4-1ubuntu1.12=1.13.4-1ubuntu1.13=1.13.4-1ubuntu1.14=1.13.4-1ubuntu1.15
Ubuntu:18.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=bionic
Affected versions
=1.15.3-2ubuntu1=1.15.3-3ubuntu1=1.16.0-5ubuntu1=1.16.0-5ubuntu2=1.16.1-1ubuntu1=1.16.1-1ubuntu1.1=1.16.1-1ubuntu1.2=1.16.1-1ubuntu1.3=1.16.1-1ubuntu1.4=1.16.1-1ubuntu1.5=1.16.1-1ubuntu1.6=1.16.1-1ubuntu1.7=1.16.1-1ubuntu1.8
Ubuntu:20.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=focal
Affected versions
=2.2.0-4ubuntu1=2.2.2-1=2.2.2-1ubuntu1=2.2.3-1.1ubuntu1=2.2.3-2=2.2.3-3=2.2.3-3ubuntu0.1=2.2.3-3ubuntu0.2=2.2.3-3ubuntu0.3=2.2.3-3ubuntu0.4=2.2.3-3ubuntu0.6=2.2.3-3ubuntu0.7=2.2.3-3ubuntu0.8=2.2.3-3ubuntu0.9=2.2.3-3ubuntu0.10=2.2.3-3ubuntu0.11=2.2.3-3ubuntu0.12=2.2.3-3ubuntu0.13
Ubuntu:22.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=jammy
Affected versions
=2.4.1-2ubuntu4=2.5.2-4ubuntu1=2.5.2-4ubuntu3=2.5.2-4ubuntu4=2.6.1-1ubuntu3=2.6.3-1ubuntu3=2.6.3-1ubuntu3.1=2.6.3-1ubuntu3.2=2.6.3-1ubuntu3.3=2.6.3-1ubuntu3.4=2.6.3-1ubuntu3.5=2.6.3-1ubuntu3.6
Ubuntu:24.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=noble
Affected versions
=2.9.1-2ubuntu2=2.9.1-2ubuntu3=2.9.2-1ubuntu2=2.9.4-1ubuntu1=2.9.4-1.1ubuntu3=2.9.4-1.1ubuntu5=2.9.4-1.1ubuntu6=2.9.4-1.1ubuntu6.1=2.9.4-1.1ubuntu6.2=2.9.4-1.1ubuntu6.3=2.9.4-1.1ubuntu6.4=2.9.4-1.1ubuntu6.5=2.9.4-1.1ubuntu6.6=2.9.4-1.1ubuntu6.7
Ubuntu:26.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=resolute
Affected versions
=2.10.1-2ubuntu5=2.10.1-2ubuntu7=2.12.0-1ubuntu3=2.12.0-1ubuntu4=2.12.0-1ubuntu5=2.12.0-1ubuntu5.1=2.12.0-1ubuntu5.2

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-68743
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
3.1

Threat ID: 6a8d9aedacd9273b493e1883

Added to database: 08/25/2026, 13:38:53 UTC

Last updated: 08/25/2026, 15:52:40 UTC

Views: 4

Community Reviews

0 reviews

Crowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.

Sort by
Loading community insights…

Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.

Actions

Please log in to the Console to use AI analysis features.

Need more coverage?

Upgrade to Pro Console for AI refresh and higher limits.

For incident response and remediation, OffSeq services can help resolve threats faster.

Latest Threats

Breach by OffSeqOFFSEQFRIENDS — 25% OFF

Check if your credentials are on the dark web

Instant breach scanning across billions of leaked records. Free tier available.

Scan now
OffSeq TrainingCredly Certified

Lead Pen Test Professional

Technical5-day eLearningPECB Accredited
View courses