A flaw was found in sssd-kcm. A local user or process able to connect to the sssd-kcm UNIX socket can exploit this vulnerability. (CVE-2026-80048)
Description
A vulnerability in sssd-kcm allows a local user or process with access to the sssd-kcm UNIX socket to cause a denial of service by sending a large request length header and stalling the connection, leading to memory exhaustion. This flaw affects multiple specific versions of sssd. The issue results in a medium severity denial of service without impacting confidentiality or integrity.
CVSS v3.1
Score 5.5medium
Affected software
pkg:deb/ubuntu/sssd?arch=source&distro=esm-infra-legacy/xenialpkg:deb/ubuntu/sssd?arch=source&distro=esm-infra/bionicpkg:deb/ubuntu/sssd?arch=source&distro=esm-infra/focalpkg:deb/ubuntu/sssd?arch=source&distro=jammypkg:deb/ubuntu/sssd?arch=source&distro=noblepkg:deb/ubuntu/sssd?arch=source&distro=stonkingpkg:deb/ubuntu/sssd?arch=source&distro=resoluteRun 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
Technical Analysis
CVE-2026-80048 is a vulnerability in the sssd-kcm component where a local user or process able to connect to the sssd-kcm UNIX socket can exploit the flaw by sending a large request length header and then stalling the connection. This causes the system to preallocate significant memory, leading to memory exhaustion within the sssd-kcm responder and resulting in a denial of service condition. The vulnerability affects numerous explicitly listed sssd versions. The CVSS v3.1 score is 5.5 (medium severity), with attack vector local, low attack complexity, low privileges required, no user interaction, unchanged scope, and impact limited to availability.
Potential Impact
The vulnerability causes denial of service by exhausting memory resources in the sssd-kcm responder. It does not affect confidentiality or integrity. Exploitation requires local access to the sssd-kcm UNIX socket. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict local access to the sssd-kcm UNIX socket to trusted users and processes to reduce risk of exploitation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-80048
- 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:26.10","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad3f56b2cdf04f6566620ef
Added to database: 10/17/2026, 22:23:39 UTC
Last enriched: 10/17/2026, 23:36:04 UTC
Last updated: 10/17/2026, 23:36:04 UTC
Views: 2
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