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A flaw was found in SSSD. A local attacker can exploit this issue by sending a specially crafted request with an invalid packet length to the autofs… (CVE-2026-104037)

0
Medium
VulnerabilityCVE-2026-104037gcveosvubuntu-cve-2026-104037cve-2026-104037ubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-26-04-lts
Published: 10/06/2026 (10/06/2026, 01:16:00 UTC)
Source: GCVE Database
Product: sssd

Description

A vulnerability in SSSD allows a local attacker to cause a denial of service by sending a specially crafted request with an invalid packet length to the autofs responder UNIX socket. This triggers an integer underflow and an out-of-bounds memory read, crashing the responder process. The issue affects multiple specific versions of SSSD and has a medium severity rating with a CVSS score of 5.5.

CVSS v3.1

Score 5.5medium

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

Affected software

Ubuntu:Pro:16.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra-legacy/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=1.13.4-1ubuntu1.15+esm1
Ubuntu:Pro:18.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra/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=1.16.1-1ubuntu1.8+esm1
Ubuntu:Pro:20.04:LTSmore threats →ghsa
sssd
pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra/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=2.2.3-3ubuntu0.13+esm1
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=2.6.3-1ubuntu3.8=2.6.3-1ubuntu3.9
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=2.9.4-1.1ubuntu6.8
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=2.12.0-1ubuntu5.3=2.12.0-1ubuntu5.4=2.12.0-1ubuntu5.5

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

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/08/2026, 22:16:54 UTC

Technical Analysis

CVE-2026-104037 describes a flaw in SSSD where a local attacker can exploit the autofs responder UNIX socket by sending a specially crafted request containing an invalid packet length. This leads to an integer underflow and an out-of-bounds memory read, resulting in the crash of the responder process and causing a denial of service condition. The vulnerability requires local access and does not impact confidentiality or integrity, only availability.

Potential Impact

The vulnerability causes a denial of service by crashing the autofs responder process within SSSD. There is no impact on confidentiality or integrity. The attacker must have local privileges to exploit this issue.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict local access to the autofs responder UNIX socket to trusted users only to reduce risk.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-104037
Osv Schema Version
1.7.0
Ecosystems
["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
Cvss Version
3.1
State
PUBLISHED

Threat ID: 6ac80fcb2cdf04f65639c4bb

Added to database: 10/08/2026, 21:48:59 UTC

Last enriched: 10/08/2026, 22:16:54 UTC

Last updated: 10/09/2026, 01:48:07 UTC

Views: 1

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