Threats Tagged 'cve-2026-58216'

An out-of-bounds read vulnerability exists in Samba's Kerberos Key Distribution Center (KDC) password change (kpasswd) service. The flaw occurs when processing malformed ASN.1-encoded Kerberos password change requests, causing the server to read beyond the allocated buffer. This typically results in a decryption failure but can cause the KDC process to crash if unmapped memory is accessed. An authenticated attacker can exploit this by sending a crafted kpasswd request, potentially causing a denial of service.

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.