CVE-2026-104034
CVE-2026-104034: 1 tracked advisory record across Red Hat. Compare vendor sources.
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Red Hat
1 advisory- Advisory severityMedium4.7
Medium [CVE-2026-104034] Sssd: sssd: denial of service via use-after-free in kcm ticket renewal
CVE-2026-104034Source published Source updated
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). This vulnerability is rated as Moderate because exploitation requires local authenticated access and relies on an optional, non-default Kerberos Credential Manager (KCM) renewal feature configured with the secdb storage backend. Under standard Red Hat Enterprise Linux deployments, automated ticket renewal within KCM is disabled by default.…
- Affected products in this advisory
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
33 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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