libssh is a multiplatform C library implementing the SSHv2 protocol on client and server side.
libssh was found to have a NULL pointer dereference in tftpserver.c if the function ssh_buffer_new returns NULL.
An attacker could cause a possible Denial of Service condition.
There is no known workaround at this time.
All libssh users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/libssh-0.9.5"