9.8

CVE-2026-64122

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

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
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.18.14 < 6.18.34
Linux ≫ Linux Kernel Version >= 6.19.4 < 7.0.11
Linux ≫ Linux Kernel Version7.1 Updaterc1
Linux ≫ Linux Kernel Version7.1 Updaterc2
Linux ≫ Linux Kernel Version7.1 Updaterc3
Linux ≫ Linux Kernel Version7.1 Updaterc4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.46% 0.375
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/1604a2d68414aa4cc34faac0b7faa9c14455e8d3
Patch
https://git.kernel.org/stable/c/152295aa7dc2c5e046606f7dadc84fce41136446
Patch
https://git.kernel.org/stable/c/7d260c5d2d89eb2c8c528d54b576b3aae3e20231
Patch