-

CVE-2026-93172

mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug

In the Linux kernel, the following vulnerability has been resolved:

mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug

We miss a failed allocation check for pgdat->per_cpu_nodestats, which
results in a NULL deref when we offset into the per-cpu area.

Propagate -ENOMEM up the stack and leave per_cpu_nodestats pointing
at boot_nodestats so a later online can retry the allocation.

hotadd_init_pgdat() returns NULL on failure, which __try_online_node()
already maps to -ENOMEM.

On failure nothing needs to be unwound:
  - the node is never marked online
  - per_cpu_nodestats is left pointing at boot_nodestats
  - __add_memory_resource() cleans up pending memblock resources
  - later online attempts retry the per_cpu_nodestats allocation
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 75ef7184053989118d3814c558a9af62e7376a58
Version < 4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc
Status affected
Version 75ef7184053989118d3814c558a9af62e7376a58
Version < bc3b5e6519b8df22d622a03eab6772784da97db4
Status affected
Version 75ef7184053989118d3814c558a9af62e7376a58
Version < 1017fe1c7f48e511c5a680e3057005daaff2f3a2
Status affected
Version 75ef7184053989118d3814c558a9af62e7376a58
Version < 2ebce860bdd7ae5e13002811bc9bbbf33fcfc221
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 4.8
Status affected
Version 0
Version < 4.8
Status unaffected
Version <= 6.12.*
Version 6.12.110
Status unaffected
Version <= 6.18.*
Version 6.18.52
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.102
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/4cc5caef9a8d1894dfa31d84a0daa0ac1437dadc
https://git.kernel.org/stable/c/bc3b5e6519b8df22d622a03eab6772784da97db4
https://git.kernel.org/stable/c/1017fe1c7f48e511c5a680e3057005daaff2f3a2
https://git.kernel.org/stable/c/2ebce860bdd7ae5e13002811bc9bbbf33fcfc221