8.7

CVE-2026-53230

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list

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

net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list

mlx5_query_nic_vport_mac_list() sizes its firmware command buffer using
the PF's log_max_current_uc/mc_list capabilities. When querying a VF
vport with a larger configured max (via devlink), the firmware response
can overflow this buffer:

 BUG: KASAN: slab-out-of-bounds in mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]
 Read of size 4 at addr ff1100013ffc8a12 by task kworker/u96:2/385

 CPU: 12 UID: 0 PID: 385 Comm: kworker/u96:2 Not tainted 7.0.0-rc6+ #1 PREEMPT
 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009)
 Workqueue: mlx5_esw_wq esw_vport_change_handler [mlx5_core]
 Call Trace:
  <TASK>
  dump_stack_lvl+0x69/0xa0
  print_report+0x176/0x4e4
  kasan_report+0xc8/0x100
  mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]
  esw_update_vport_addr_list+0x2e3/0xda0 [mlx5_core]
  esw_vport_change_handle_locked+0xa1f/0x1060 [mlx5_core]
  esw_vport_change_handler+0x6a/0x90 [mlx5_core]
  process_one_work+0x87f/0x15e0
  worker_thread+0x62b/0x1020
  kthread+0x375/0x490
  ret_from_fork+0x4dc/0x810
  ret_from_fork_asm+0x11/0x20
  </TASK>

Fix by querying the vport's own HCA caps to size the buffer correctly.
Refactor the function to allocate and return the MAC list internally,
removing the caller's dependency on knowing the correct max.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.5 < 6.6.143
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.94
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.36
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.13
Linux ≫ Linux Kernel Version7.1 Updaterc1
Linux ≫ Linux Kernel Version7.1 Updaterc2
Linux ≫ Linux Kernel Version7.1 Updaterc3
Linux ≫ Linux Kernel Version7.1 Updaterc4
Linux ≫ Linux Kernel Version7.1 Updaterc5
Linux ≫ Linux Kernel Version7.1 Updaterc6
Linux ≫ Linux Kernel Version7.1 Updaterc7
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.13% 0.03
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.7 2 6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:H
CWE-125 Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

https://git.kernel.org/stable/c/41781f2789309462520a93822e946521ed78f97f
Patch
https://git.kernel.org/stable/c/537d87784e81c3d7037525b99416455cee088cdc
Patch
https://git.kernel.org/stable/c/0f807764bb122fd63aa45f4229cb1ef2679fbd40
Patch
https://git.kernel.org/stable/c/2398e497389ed4be43f7cfbab499b49cec7dae1a
Patch
https://git.kernel.org/stable/c/894e036a24a26a6dd7b17d8d3fb5c53ab48a6074
Patch