DEBIAN-CVE-2026-104034

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Source

https://security-tracker.debian.org/tracker/CVE-2026-104034

Import Source

https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104034.json

JSON Data

https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-104034

Upstream

CVE-2026-104034

Published

2026-10-06T01:16:34Z

Modified

2026-10-15T22:00:06Z

Severity

4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

[none]

Details

A flaw was found in SSSD. A use-after-free vulnerability exists in the Kerberos Credential Manager (KCM) responder during Kerberos ticket-granting ticket (TGT) renewal, where a deferred callback accesses memory that has already been released. An authenticated local user with a renewable Kerberos ticket can trigger this issue on systems configured with KCM renewal, causing the KCM responder service to crash and resulting in a Denial of Service (DoS).

References

https://security-tracker.debian.org/tracker/CVE-2026-104034

Affected packages

Debian:12 / sssd

Package

Name: sssd
Purl: pkg:deb/debian/sssd?arch=source&distro=bookworm

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.8.2-4

2.8.2-4+deb12u1

2.9.1-1

2.9.1-2

2.9.2-1

2.9.4-1

2.9.4-1.1~exp1

2.9.4-1.1

2.9.4-2

2.9.5-1

2.9.5-2

2.9.5-3

2.9.5-4

2.9.5-5

2.10.1-1

2.10.1-2

2.11.1-1

2.11.1-2

2.11.1-2.1

2.12.0-1

2.12.0-2

2.12.0-3~exp0

2.12.0-4

2.13.1-1

2.13.1-2

2.13.1-3

Ecosystem specific

{
    "urgency":  "unimportant"
}

Database specific

source

"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-104034.json"

Debian:13 / sssd