PT-2026-61439 · Linux · Linux

CVE-2026-64122 · Publicado 2026-07-19 · Atualizado 2026-07-19

Mitre

CVSS v3.1

9.8

Crítica

Vetor base

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

net/mlx5e: Fix use-after-free in mlx5e tx reporter timeout recover

mlx5e tx reporter timeout recover() accesses sq->netdev after mlx5e safe reopen channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown.

The netdev err() call already used priv->netdev for this reason; make the trylock/unlock and health channel eq recover calls consistent.

This fixes the following KASAN splat:

BUG: KASAN: use-after-free in mlx5e tx reporter timeout recover+0x1dd/0x360 [mlx5 core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277

Call Trace: mlx5e tx reporter timeout recover+0x1dd/0x360 [mlx5 core] devlink health reporter recover+0xa2/0x150 devlink health report+0x254/0x7c0 mlx5e reporter tx timeout+0x297/0x380 [mlx5 core] mlx5e tx timeout work+0x109/0x170 [mlx5 core] process one work+0x677/0xf20 worker thread+0x51f/0xd90 kthread+0x3a5/0x810 ret from fork+0x208/0x400 ret from fork asm+0x1a/0x30

Correção

Identificadores relacionados

CVE-2026-64122

Produtos afetados

Linux

Referências · 4

• https://git.kernel.org/stable/c/7d260c5d2d89eb2c8c528d54b576b3aae3e20231 · Nota
• https://git.kernel.org/stable/c/1604a2d68414aa4cc34faac0b7faa9c14455e8d3 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-64122 · Nota de Segurança
• https://git.kernel.org/stable/c/152295aa7dc2c5e046606f7dadc84fce41136446 · Nota