PT-2026-52325 · Linux · Linux

Publicado 2026-06-25 · Atualizado 2026-06-25 · CVE-2026-53230

NVD

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: 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

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.

Identificadores relacionados

CVE-2026-53230

Produtos afetados

Linux

Referências · 6

• https://git.kernel.org/stable/c/41781f2789309462520a93822e946521ed78f97f · Nota
• https://git.kernel.org/stable/c/537d87784e81c3d7037525b99416455cee088cdc · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-53230 · Nota de Segurança
• https://git.kernel.org/stable/c/0f807764bb122fd63aa45f4229cb1ef2679fbd40 · Nota
• https://git.kernel.org/stable/c/2398e497389ed4be43f7cfbab499b49cec7dae1a · Nota
• https://git.kernel.org/stable/c/894e036a24a26a6dd7b17d8d3fb5c53ab48a6074 · Nota