Unknown severity · Source severity not reportedCVE-2026-23035

net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of privCVE-2026-23035

Answer in brief

CVE-2026-23035 records a Unknown severity vulnerability in net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of priv. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jan 31, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=c4d7eb57687f358cd498ea3624519236af8db97e <444b0e44aa43081d4ddd138575e5a2dcabf439c7 \|\| >=c4d7eb57687f358cd498ea3624519236af8db97e <a7625bacaa8c8c2bfcde6dd6d1397bd63ad82b02 \|\| >=c4d7eb57687f358cd498ea3624519236af8db97e <66a25f6b7c0bfd84e6d27b536f5d24116dbd52da \|\| >=c4d7eb57687f358cd498ea3624519236af8db97e <4ef8512e1427111f7ba92b4a847d181ff0aeec42	444b0e44aa43081d4ddd138575e5a2dcabf439c7, a7625bacaa8c8c2bfcde6dd6d1397bd63ad82b02, 66a25f6b7c0bfd84e6d27b536f5d24116dbd52da, 4ef8512e1427111f7ba92b4a847d181ff0aeec42
Linux/Linuxgeneric	5.12	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 444b0e44aa43081d4ddd138575e5a2dcabf439c7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jan 31, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 21, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Pass netdev to mlx5e_destroy_netdev instead of priv mlx5e_priv is an unstable structure that can be memset(0) if profile attaching fails. Pass netdev to mlx5e_destroy_netdev() to guarantee it will work on a valid netdev. On mlx5e_remove: Check validity of priv->profile, before attempting to cleanup any resources that might be not there. This fixes a kernel oops in mlx5e_remove when switchdev mode fails due to change profile failure. $ devlink dev eswitch set pci/0000:00:03.0 mode switchdev Error: mlx5_core: Failed setting eswitch to offloads. dmesg: workqueue: Failed to create a rescuer kthread for wq "mlx5e": -EINTR mlx5_core 0012:03:00.1: mlx5e_netdev_init_profile:6214:(pid 37199): mlx5e_priv_init failed, err=-12 mlx5_core 0012:03:00.1 gpu3rdma1: mlx5e_netdev_change_profile: new profile init failed, -12 workqueue: Failed to create a rescuer kthread for wq "mlx5e": -EINTR mlx5_core 0012:03:00.1: mlx5e_netdev_init_profile:6214:(pid 37199): mlx5e_priv_init failed, err=-12 mlx5_core 0012:03:00.1 gpu3rdma1: mlx5e_netdev_change_profile: failed to rollback to orig profile, -12 $ devlink dev reload pci/0000:00:03.0 ==> oops BUG: kernel NULL pointer dereference, address: 0000000000000370 PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 15 UID: 0 PID: 520 Comm: devlink Not tainted 6.18.0-rc5+ #115 PREEMPT(voluntary) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 RIP: 0010:mlx5e_dcbnl_dscp_app+0x23/0x100 RSP: 0018:ffffc9000083f8b8 EFLAGS: 00010286 RAX: ffff8881126fc380 RBX: ffff8881015ac400 RCX: ffffffff826ffc45 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881035109c0 RBP: ffff8881035109c0 R08: ffff888101e3e838 R09: ffff888100264e10 R10: ffffc9000083f898 R11: ffffc9000083f8a0 R12: ffff888101b921a0 R13: ffff888101b921a0 R14: ffff8881015ac9a0 R15: ffff8881015ac400 FS: 00007f789a3c8740(0000) GS:ffff88856aa59000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000370 CR3: 000000010b6c0001 CR4: 0000000000370ef0 Call Trace: <TASK> mlx5e_remove+0x57/0x110 device_release_driver_internal+0x19c/0x200 bus_remove_device+0xc6/0x130 device_del+0x160/0x3d0 ? devl_param_driverinit_value_get+0x2d/0x90 mlx5_detach_device+0x89/0xe0 mlx5_unload_one_devl_locked+0x3a/0x70 mlx5_devlink_reload_down+0xc8/0x220 devlink_reload+0x7d/0x260 devlink_nl_reload_doit+0x45b/0x5a0 genl_family_rcv_msg_doit+0xe8/0x140

Quoted source text, attributed separately from HOL analysis.