  We investigate the stability of the non-supersymmetric solutions of type-IIB
supergravity having an unwarped $AdS$ factor and $\lambda$-deformed subspaces
found in arXiv:1911.12371. Among the plethora of solutions we study the
perturbative stability of backgrounds with an $AdS_n$, with $n = 3,4,6$,
factor. Our analysis is performed from a lower dimensional effective theory
which we construct. We uncover the regions and isolated points in the parameter
space of potential perturbative stability.
