CVE-2026-104034
Last modified
CVE-2026-104034 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. 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. EPSS estimates a 0.09% chance of exploitation in the next 30 days.
Description
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).
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | All versions |
| Red Hat | Red Hat Enterprise Linux 6 | All versions |
| Red Hat | Red Hat Enterprise Linux 7 | All versions |
| Red Hat | Red Hat Enterprise Linux 8 | All versions |
| Red Hat | Red Hat Enterprise Linux 9 | All versions |
| Red Hat | Red Hat OpenShift Container Platform 4 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-104034?
How severe is CVE-2026-104034?
How do I fix CVE-2026-104034?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-104028The Anton Extensions WordPress plugin through 1.2.2 does not…9.8
- CVE-2026-104029A flaw was found in SSSD. A local attacker can exploit this …3.3
- CVE-2026-104030A flaw was found in sssd. This vulnerability allows a local …5.5
- CVE-2026-104031A flaw was found in SSSD. In configurations where the autofs…5.5
- CVE-2026-104032A flaw was found in SSSD. An unprivileged local user can rep…5.5
- CVE-2026-104033A flaw was found in SSSD. When configured to enforce account…5.4
- CVE-2026-104035A flaw was found in SSSD. An issue in the Kerberos Credentia…5.5
- CVE-2026-104036A flaw was found in SSSD's NFS idmap plugin. When retrieving…5.8
- CVE-2026-104037A flaw was found in SSSD. A local attacker can exploit this …5.5
- CVE-2026-104038A flaw was found in sssd. A remote attacker can cause a deni…5.9
- CVE-2026-104039A flaw was found in SSSD. A local user can cause a denial of…4.7
- CVE-2026-104040A flaw was found in SSSD. When configured with the Entra ID …4.4
Are you affected by CVE-2026-104034?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST