CVE-2026-43467

/// Technical description

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

net/mlx5: Fix crash when moving to switchdev mode

When moving to switchdev mode when the device doesn't support IPsec,

we try to clean up the IPsec resources anyway which causes the crash

below, fix that by correctly checking for IPsec support before trying

to clean up its resources.

[27642.515799] WARNING: arch/x86/mm/fault.c:1276 at

do_user_addr_fault+0x18a/0x680, CPU#4: devlink/6490

[27642.517159] Modules linked in: xt_conntrack xt_MASQUERADE

ip6table_nat ip6table_filter ip6_tables iptable_nat nf_nat xt_addrtype

rpcsec_gss_krb5 auth_rpcgss oid_registry overlay mlx5_fwctl nfnetlink

zram zsmalloc mlx5_ib fuse rpcrdma rdma_ucm ib_uverbs ib_iser libiscsi

scsi_transport_iscsi ib_umad rdma_cm ib_ipoib iw_cm ib_cm mlx5_core

ib_core

[27642.521358] CPU: 4 UID: 0 PID: 6490 Comm: devlink Not tainted

6.19.0-rc5_for_upstream_min_debug_2026_01_14_16_47 #1 NONE

[27642.522923] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References