CVE-2026-43344

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the Linux kernel within the perf/x86/intel/uncore component regarding die ID initialization and lookup. In the snbep pci2phy map init() function, when nr node ids is greater than 8, the uncore device to die() function may return -1 if all CPUs associated with the UBOX device are offline. Additionally, when NUMA (Non-Uniform Memory Access, a memory design used in multiprocessing) is disabled on a NUMA-capable platform, pcibus to node() returns NUMA NO NODE, causing uncore device to die() to return -1 for all PCI devices. This leads the spr update device location() function, used on Intel SPR and EMR, to ignore PMON units and fail to add them to the RB tree.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.