Description (CNA)
An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) service. When processing malformed ASN.1-encoded Kerberos password change request, Samba server miscalculates the structure size and attempts to read up to six bytes beyond the end of the allocated buffer. While this out-of-bounds read typically results in a harmless decryption failure, if the read hits unmapped memory, it causes the KDC process to crash. An authenticated attacker can send a specially crafted kpasswd request containing malformed ASN.1 data to trigger the out-of-bounds read, which may cause the KDC process to terminate, resulting in a denial of service.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat Enterprise Linux 10 | unknown |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 6 | unknown |
| Red Hat / Red Hat Enterprise Linux 7 | unknown |
| Red Hat / Red Hat Enterprise Linux 8 | unknown |
| Red Hat / Red Hat Enterprise Linux 9 | unknown |
| Red Hat / Red Hat OpenShift Container Platform 4 | unknown |
CWE
CWE-125
References
- https://access.redhat.com/security/cve/CVE-2026-58216
- https://bugzilla.redhat.com/show_bug.cgi?id=2502721
- https://bugzilla.samba.org/show_bug.cgi?id=16087
- https://www.samba.org/samba/security/CVE-2026-58216.html
ADP enrichment
No English description supplied.
No references supplied.