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CVE

CVE-2026-64122

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

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 mlx5etxreportertimeoutrecover

mlx5etxreportertimeoutrecover() accesses sq->netdev after

mlx5esafereopen_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 healthchanneleq_recover calls consistent.

This fixes the following KASAN splat:

  BUG: KASAN: use-after-free in mlx5etxreportertimeoutrecover+0x1dd/0x360 [mlx5_core]

  Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277

  Call Trace:

   mlx5etxreportertimeoutrecover+0x1dd/0x360 [mlx5_core]

   devlinkhealthreporter_recover+0xa2/0x150

   devlinkhealthreport+0x254/0x7c0

   mlx5ereportertxtimeout+0x297/0x380 [mlx5core]

   mlx5etxtimeoutwork+0x109/0x170 [mlx5core]

   processonework+0x677/0xf20

   worker_thread+0x51f/0xd90

   kthread+0x3a5/0x810

   retfromfork+0x208/0x400

   retfromfork_asm+0x1a/0x30

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/152295aa7dc2c5e046606f7dadc84fce41136446, https://git.kernel.org/stable/c/1604a2d68414aa4cc34faac0b7faa9c14455e8d3, https://git.kernel.org/stable/c/7d260c5d2d89eb2c8c528d54b576b3aae3e20231, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64122.json, https://nvd.nist.gov/vuln/detail/CVE-2026-64122, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00461%
EPSS Percentile
0.38342%
Introduced Version
4329514c61abefe4961541b128c549b017bab5ad,83ac0304a2d77519dae1e54c9713cbe1aedf19c9,0,6.18.14,6.19.4,6.19.0
Fix Available
1604a2d68414aa4cc34faac0b7faa9c14455e8d3,7d260c5d2d89eb2c8c528d54b576b3aae3e20231,6.18.34,6.20,7.0.11,7.0.0-28.28~24.04.1,7.0.0-1016.16~24.04.1,7.0.0-28.28.1~24.04.3,0:6.12.0-206.104.3.3.el9uek,0:6.12.0-206.104.3.3.el10uek,1:6.18.35-68.127.amzn2023,1:1.0-0.amzn2023

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