CVE-2026-23046 Details
Description
In the Linux kernel, the following vulnerability has been resolved: virtio_net: fix device mismatch in devm_kzalloc/devm_kfree Initial rss_hdr allocation uses virtio_device->device, but virtnet_set_queues() frees using net_device->device. This device mismatch causing below devres warning [ 3788.514041] ------------[ cut here ]------------ [ 3788.514044] WARNING: drivers/base/devres.c:1095 at devm_kfree+0x84/0x98, CPU#16: vdpa/1463 [ 3788.514054] Modules linked in: octep_vdpa virtio_net virtio_vdpa [last unloaded: virtio_vdpa] [ 3788.514064] CPU: 16 UID: 0 PID: 1463 Comm: vdpa Tainted: G W 6.18.0 #10 PREEMPT [ 3788.514067] Tainted: [W]=WARN [ 3788.514069] Hardware name: Marvell CN106XX board (DT) [ 3788.514071] pstate: 63400009 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) [ 3788.514074] pc : devm_kfree+0x84/0x98 [ 3788.514076] lr : devm_kfree+0x54/0x98 [ 3788.514079] sp : ffff800084e2f220 [ 3788.514080] x29: ffff800084e2f220 x28: ffff0003b2366000 x27: 000000000000003f [ 3788.514085] x26: 000000000000003f x25: ffff000106f17c10 x24: 0000000000000080 [ 3788.514089] x23: ffff00045bb8ab08 x22: ffff00045bb8a000 x21: 0000000000000018 [ 3788.514093] x20: ffff0004355c3080 x19: ffff00045bb8aa00 x18: 0000000000080000 [ 3788.514098] x17: 0000000000000040 x16: 000000000000001f x15: 000000000007ffff [ 3788.514102] x14: 0000000000000488 x13: 0000000000000005 x12: 00000000000fffff [ 3788.514106] x11: ffffffffffffffff x10: 0000000000000005 x9 : ffff800080c8c05c [ 3788.514110] x8 : ffff800084e2eeb8 x7 : 0000000000000000 x6 : 000000000000003f [ 3788.514115] x5 : ffff8000831bafe0 x4 : ffff800080c8b010 x3 : ffff0004355c3080 [ 3788.514119] x2 : ffff0004355c3080 x1 : 0000000000000000 x0 : 0000000000000000 [ 3788.514123] Call trace: [ 3788.514125] devm_kfree+0x84/0x98 (P) [ 3788.514129] virtnet_set_queues+0x134/0x2e8 [virtio_net] [ 3788.514135] virtnet_probe+0x9c0/0xe00 [virtio_net] [ 3788.514139] virtio_dev_probe+0x1e0/0x338 [ 3788.514144] really_probe+0xc8/0x3a0 [ 3788.514149] __driver_probe_device+0x84/0x170 [ 3788.514152] driver_probe_device+0x44/0x120 [ 3788.514155] __device_attach_driver+0xc4/0x168 [ 3788.514158] bus_for_each_drv+0x8c/0xf0 [ 3788.514161] __device_attach+0xa4/0x1c0 [ 3788.514164] device_initial_probe+0x1c/0x30 [ 3788.514168] bus_probe_device+0xb4/0xc0 [ 3788.514170] device_add+0x614/0x828 [ 3788.514173] register_virtio_device+0x214/0x258 [ 3788.514175] virtio_vdpa_probe+0xa0/0x110 [virtio_vdpa] [ 3788.514179] vdpa_dev_probe+0xa8/0xd8 [ 3788.514183] really_probe+0xc8/0x3a0 [ 3788.514186] __driver_probe_device+0x84/0x170 [ 3788.514189] driver_probe_device+0x44/0x120 [ 3788.514192] __device_attach_driver+0xc4/0x168 [ 3788.514195] bus_for_each_drv+0x8c/0xf0 [ 3788.514197] __device_attach+0xa4/0x1c0 [ 3788.514200] device_initial_probe+0x1c/0x30 [ 3788.514203] bus_probe_device+0xb4/0xc0 [ 3788.514206] device_add+0x614/0x828 [ 3788.514209] _vdpa_register_device+0x58/0x88 [ 3788.514211] octep_vdpa_dev_add+0x104/0x228 [octep_vdpa] [ 3788.514215] vdpa_nl_cmd_dev_add_set_doit+0x2d0/0x3c0 [ 3788.514218] genl_family_rcv_msg_doit+0xe4/0x158 [ 3788.514222] genl_rcv_msg+0x218/0x298 [ 3788.514225] netlink_rcv_skb+0x64/0x138 [ 3788.514229] genl_rcv+0x40/0x60 [ 3788.514233] netlink_unicast+0x32c/0x3b0 [ 3788.514237] netlink_sendmsg+0x170/0x3b8 [ 3788.514241] __sys_sendto+0x12c/0x1c0 [ 3788.514246] __arm64_sys_sendto+0x30/0x48 [ 3788.514249] invoke_syscall.constprop.0+0x58/0xf8 [ 3788.514255] do_el0_svc+0x48/0xd0 [ 3788.514259] el0_svc+0x48/0x210 [ 3788.514264] el0t_64_sync_handler+0xa0/0xe8 [ 3788.514268] el0t_64_sync+0x198/0x1a0 [ 3788.514271] ---[ end trace 0000000000000000 ]--- Fix by using virtio_device->device consistently for allocation and deallocation
A vulnerability has been identified in the Linux kernel's virtio_net component, related to improper management of device resources. The issue arises because the initial allocation of the RSS header uses the virtio_device's device reference, while the deallocation in the virtnet_set_queues function uses the net_device's device reference. This mismatch triggers a warning from the device resource management system, indicating a potential issue that could be exploited.
The vulnerability has been addressed by modifying the virtio_net component to use the virtio_device's device reference consistently for both allocation and deallocation of the RSS header. Users should upgrade to the latest version of the Linux kernel where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Feb 4, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/a5e2d902f64c76169c771f584559c82b588090e3 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/acb4bc6e1ba34ae1a34a9334a1ce8474c909466e | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| virtio_net | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Feb 4, 2026 | New CVE Received | kernel.org |