CVE-2026-104034CWE-825

CVE-2026-104034

Medium · published October 6, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
0.4
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00089 · 0.4th percentile
Weakness
CWE-825 · Expired Pointer Dereference
Published
2026-10-06T05:16Z
References (2)
https://access.redhat.com/security/cve/CVE-2026-104034 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2479178 · [email protected]
EPSS history
Timeline
  • 07 OCT 03:39Z
    EPSS moved — → 0%
    epss
  • 06 OCT 00:12Z
    Sssd: sssd: denial of service via use-after-free in kcm ticket renewal
    cvelistv5