CVE-2026-46029

In the Linux kernel, the following vulnerability has been resolved: mm/slab: return NULL early from kmallocnolock in NMI on UP On UP kernels !CONFIGSMP, spintrylock is a no-op that unconditionally succeeds even when the lock is already held. As a result, kmallocnolock called from NMI context can...

UBUNTU-CVE-2026-46035

In the Linux kernel, the following vulnerability has been resolved: mm/pagealloc: return NULL early from allocfrozenpagesnolock in NMI on UP On UP kernels !CONFIGSMP, spintrylock is a no-op that unconditionally succeeds even when the lock is already held. As a result, allocfrozenpagesnolock calle...

CVE-2026-46035

Summary (CVE-2026-46035): Linux kernel UP (non-SMP) builds are fixed so that alloc_frozen_pages_nolock() invoked from an NMI returns NULL early, preventing re-entry of rmqueue() and corruption of freelists due to spin_trylock() becoming a no-op. The issue occurs when CONFIG_DEBUG_SPINLOCK is enab...

PT-2026-43902

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description On Uniprocessor UP kernels where CONFIG SMP is not enabled, the spin trylock function acts as a no-op and succeeds unconditionally, even if the lock is already held. This allows alloc...