Critical 9.8Published Jul 19, 2026

CVE-2026-64122net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover

Updated under an hour ago (Oct 27, 2026, 6:40 PM ET)

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Exploited in the last 30 days

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

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	4329514c61abefe4961541b128c549b017bab5ad builds before 1604a2d68414aa4cc34faac0b7faa9c14455e8d3; from 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 before 152295aa7dc2c5e046606f7dadc84fce41136446; 83ac0304a2d77519dae1e54c9713cbe1aedf19c9 builds before 7d260c5d2d89eb2c8c528d54b576b3aae3e20231; 63f9d5fb4d8040077df801ca3270e2f02d55e0d9; from 6.18.14 before 6.18.34; from 6.19.4 before 6.20	CNA record
linux linux_kernel linux:linux_kernel	from 6.18.14 before 6.18.34; from 6.19.4 before 7.0.11; 7.1; 7.1; 7.1; 7.1	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.