Race condition in nss_ldap, when used in applications that are linked against the pthread library and fork after a call to nss_ldap, might send user data to the wrong process because of improper handling of the LDAP connection. NOTE: this issue was originally reported for Dovecot with the wrong mailboxes being returned, but other applications might also be affected.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.