Riskcovery

CVE-2026-64122

net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover

State
Published
Severity
9.8 Critical
Published
Jul 19, 2026
Updated
Aug 5, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

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

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 4329514c61abefe4961541b128c549b017bab5ad to before 1604a2d68414aa4cc34faac0b7faa9c14455e8d3Affected
  • 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 to before 152295aa7dc2c5e046606f7dadc84fce41136446Affected
  • 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 to before 7d260c5d2d89eb2c8c528d54b576b3aae3e20231Affected
  • 63f9d5fb4d8040077df801ca3270e2f02d55e0d9Affected
  • 6.18.14 to before 6.18.34Affected
  • 6.19.4 to before 6.20Affected
LinuxLinux
  • 7.0Affected
  • before 7.0Not affected
  • 6.18.34 through 6.18.*Not affected
  • 7.0.11 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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