Riskcovery

CVE-2025-68779

net/mlx5e: Avoid unregistering PSP twice

State
Published
Severity
Not scored
Published
Jan 13, 2026
Updated
May 11, 2026
Reserved
Dec 24, 2025

Read the record on cve.org

Description

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

net/mlx5e: Avoid unregistering PSP twice

PSP is unregistered twice in: _mlx5e_remove -> mlx5e_psp_unregister mlx5e_nic_cleanup -> mlx5e_psp_unregister

This leads to a refcount underflow in some conditions: ------------[ cut here ]------------ refcount_t: underflow; use-after-free. WARNING: CPU: 2 PID: 1694 at lib/refcount.c:28 refcount_warn_saturate+0xd8/0xe0 [...] mlx5e_psp_unregister+0x26/0x50 [mlx5_core] mlx5e_nic_cleanup+0x26/0x90 [mlx5_core] mlx5e_remove+0xe6/0x1f0 [mlx5_core] auxiliary_bus_remove+0x18/0x30 device_release_driver_internal+0x194/0x1f0 bus_remove_device+0xc6/0x130 device_del+0x159/0x3c0 mlx5_rescan_drivers_locked+0xbc/0x2a0 [mlx5_core] [...]

Do not directly remove psp from the _mlx5e_remove path, the PSP cleanup happens as part of profile cleanup.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 89ee2d92f66c45625ff1c173df2dbdea32568c5d to before e12c912f92ccea671b514caf371f28485714bb4bAffected
  • 89ee2d92f66c45625ff1c173df2dbdea32568c5d to before 35e93736f69963337912594eb3951ab320b77521Affected
LinuxLinux
  • 6.18Affected
  • before 6.18Not affected
  • 6.18.3 through 6.18.*Not affected
  • 6.19 and laterNot affected

References

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