published September 17, 2026
In the Linux kernel, the following vulnerability has been resolved:
iommu/tegra241-cmdqv: Fix VINTF0 leak on the init-failure path
tegra241_cmdqv_init_structures() allocates VINTF0 with kzalloc_obj(), inits
it, and preallocates its logical VCMDQs. Two of its error paths leak.
When tegra241_cmdqv_init_vintf() fails it returns before VINTF0 reaches the
cmdqv->vintfs[] array, so the devres unwind on probe failure cannot reach
it; free it directly there.
A later VCMDQ preallocation failure instead leaves VINTF0 published, and so
this time the unwind does reach tegra241_cmdqv_remove_vintf(), which then
frees it from vintf->hyp_own. But tegra241_vintf_hw_init() sets that flag
only afterward, from a HW read-back, so the still-uninited VINTF0 reads as
guest-owned and leaks, with mutex_destroy() and ida_destroy() run on fields
it never set up.
Decide ownership from vintf->idx instead, the index assigned when its id is
allocated: idx 0 is the kernel-owned VINTF0, while idx >= 1 marks a guest
VINTF. So the in-kernel free decision in tegra241_cmdqv_remove_vintf() and
tegra241_vintf_free_lvcmdq() now keys on idx too, and hyp_own stays a pure
HW-readback state.