In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: Fix switchdev mode rollback in case of failure
If for some internal reason switchdev mode fails, we rollback to legacy
mode, before this patch, rollback will unregister the uplink netdev and
leave it unregistered causing the below kernel bug.
To fix this, we need to avoid netdev unregister by setting the proper
rollback flag 'MLX5_PRIV_FLAGS_SWITCH_LEGACY' to indicate legacy mode.
devlink (431) used greatest stack depth: 11048 bytes left
mlx5_core 0000:00:03.0: E-Switch: Disable: mode(LEGACY), nvfs(0), \
necvfs(0), active vports(0)
mlx5_core 0000:00:03.0: E-Switch: Supported tc chains and prios offload
mlx5_core 0000:00:03.0: Loading uplink representor for vport 65535
mlx5_core 0000:00:03.0: mlx5_cmd_out_err:816:(pid 456): \
QUERY_HCA_CAP(0x100) op_mod(0x0) failed, \
status bad parameter(0x3), syndrome (0x3a3846), err(-22)
mlx5_core 0000:00:03.0 enp0s3np0 (unregistered): Unloading uplink \
representor for vport 65535
------------[ cut here ]------------
kernel BUG at net/core/dev.c:12070!
Oops: invalid opcode: 0000 [#1] SMP NOPTI
CPU: 2 UID: 0 PID: 456 Comm: devlink Not tainted 6.16.0-rc3+ \
#9 PREEMPT(voluntary)
RIP: 0010:unregister_netdevice_many_notify+0x123/0xae0
...
Call Trace:
[ 90.923094] unregister_netdevice_queue+0xad/0xf0
[ 90.923323] unregister_netdev+0x1c/0x40
[ 90.923522] mlx5e_vport_rep_unload+0x61/0xc6
[ 90.923736] esw_offloads_enable+0x8e6/0x920
[ 90.923947] mlx5_eswitch_enable_locked+0x349/0x430
[ 90.924182] ? is_mp_supported+0x57/0xb0
[ 90.924376] mlx5_devlink_eswitch_mode_set+0x167/0x350
[ 90.924628] devlink_nl_eswitch_set_doit+0x6f/0xf0
[ 90.924862] genl_family_rcv_msg_doit+0xe8/0x140
[ 90.925088] genl_rcv_msg+0x18b/0x290
[ 90.925269] ? __pfx_devlink_nl_pre_doit+0x10/0x10
[ 90.925506] ? __pfx_devlink_nl_eswitch_set_doit+0x10/0x10
[ 90.925766] ? __pfx_devlink_nl_post_doit+0x10/0x10
[ 90.926001] ? __pfx_genl_rcv_msg+0x10/0x10
[ 90.926206] netlink_rcv_skb+0x52/0x100
[ 90.926393] genl_rcv+0x28/0x40
[ 90.926557] netlink_unicast+0x27d/0x3d0
[ 90.926749] netlink_sendmsg+0x1f7/0x430
[ 90.926942] __sys_sendto+0x213/0x220
[ 90.927127] ? __sys_recvmsg+0x6a/0xd0
[ 90.927312] __x64_sys_sendto+0x24/0x30
[ 90.927504] do_syscall_64+0x50/0x1c0
[ 90.927687] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 90.927929] RIP: 0033:0x7f7d0363e047
References
Configurations
Configuration 1 (hide)
|
History
07 May 2026, 20:28
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/2ebb13f3e8be0b61f72425b34cce60c8b6ad1891 - Patch | |
| References | () https://git.kernel.org/stable/c/403186400a1a6166efe7031edc549c15fee4723f - Patch | |
| References | () https://git.kernel.org/stable/c/4363698838b7ec6e8d85b179495889aa7e522f91 - Patch | |
| References | () https://git.kernel.org/stable/c/e27153b2bd6e6699b544ac4dfa35d167bed5e642 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | NVD-CWE-noinfo | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* |
01 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-01 15:16
Updated : 2026-05-07 20:28
NVD link : CVE-2026-43012
Mitre link : CVE-2026-43012
CVE.ORG link : CVE-2026-43012
JSON object : View
Products Affected
linux
- linux_kernel
CWE