Medium 5.5Published Sep 4, 2025

CVE-2025-38683hv_netvsc: Fix panic during namespace deletion with VF

Updated under an hour ago (Oct 27, 2026, 2:23 AM ET)

Does this affect you?

It affects Linux and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: hv_netvsc: Fix panic during namespace deletion with VF The existing code move the VF NIC to new namespace when NETDEV_REGISTER is received on netvsc NIC. During deletion of the namespace, default_device_exit_batch() >> default_device_exit_net() is called. When netvsc NIC is moved back and registered to the default namespace, it automatically brings VF NIC back to the default namespace. This will cause the default_device_exit_net() >> for_each_netdev_safe loop unable to detect the list end, and hit NULL ptr: [ 231.449420] mana 7870:00:00.0 enP30832s1: Moved VF to namespace with: eth0 [ 231.449656] BUG: kernel NULL pointer dereference, address: 0000000000000010 [ 231.450246] #PF: supervisor read access in kernel mode [ 231.450579] #PF: error_code(0x0000) - not-present page [ 231.450916] PGD 17b8a8067 P4D 0 [ 231.451163] Oops: Oops: 0000 [#1] SMP NOPTI [ 231.451450] CPU: 82 UID: 0 PID: 1394 Comm: kworker/u768:1 Not tainted 6.16.0-rc4+ #3 VOLUNTARY [ 231.452042] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/21/2024 [ 231.452692] Workqueue: netns cleanup_net [ 231.452947] RIP: 0010:default_device_exit_batch+0x16c/0x3f0 [ 231.453326] Code: c0 0c f5 b3 e8 d5 db fe ff 48 85 c0 74 15 48 c7 c2 f8 fd ca b2 be 10 00 00 00 48 8d 7d c0 e8 7b 77 25 00 49 8b 86 28 01 00 00 <48> 8b 50 10 4c 8b 2a 4c 8d 62 f0 49 83 ed 10 4c 39 e0 0f 84 d6 00 [ 231.454294] RSP: 0018:ff75fc7c9bf9fd00 EFLAGS: 00010246 [ 231.454610] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 61c8864680b583eb [ 231.455094] RDX: ff1fa9f71462d800 RSI: ff75fc7c9bf9fd38 RDI: 0000000030766564 [ 231.455686] RBP: ff75fc7c9bf9fd78 R08: 0000000000000000 R09: 0000000000000000 [ 231.456126] R10: 0000000000000001 R11: 0000000000000004 R12: ff1fa9f70088e340 [ 231.456621] R13: ff1fa9f70088e340 R14: ffffffffb3f50c20 R15: ff1fa9f7103e6340 [ 231.457161] FS: 0000000000000000(0000) GS:ff1faa6783a08000(0000) knlGS:0000000000000000 [ 231.457707] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 231.458031] CR2: 0000000000000010 CR3: 0000000179ab2006 CR4: 0000000000b73ef0 [ 231.458434] Call Trace: [ 231.458600] <TASK> [ 231.458777] ops_undo_list+0x100/0x220 [ 231.459015] cleanup_net+0x1b8/0x300 [ 231.459285] process_one_work+0x184/0x340 To fix it, move the ns change to a workqueue, and take rtnl_lock to avoid changing the netdev list when default_device_exit_net() is using it.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 19, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	3eb6aa870057da9f1304db660f68b9c2eb7e856d builds before 3ca41ab55d23a0aa71661a5a56a8f06c11db90dc; from b7a396f76ada277d049558db648389456458af65 before 3467c4ebb334658c6fcf3eabb64a6e8b2135e010; 4faa6e3e66b3251eb4bf5761d2f3f0f14095aaca builds before 4eff1e57a8ef98d70451b94e8437e458b27dd234; 62c85b9a0dd7471a362170323e1211ad98ff7b4b builds before 2a70cbd1aef8b8be39992ab7b776ce1390091774; from 4c262801ea60c518b5bebc22a09f5b78b3147da2 before d036104947176d030bec64792d54e1b4f4c7f318; from 4c262801ea60c518b5bebc22a09f5b78b3147da2 before 5276896e6923ebe8c68573779d784aaf7d987cce; from 4c262801ea60c518b5bebc22a09f5b78b3147da2 before 4293f6c5ccf735b26afeb6825def14d830e0367b; from 4c262801ea60c518b5bebc22a09f5b78b3147da2 before 33caa208dba6fa639e8a92fd0c8320b652e5550c; and 10 more ranges	CNA record
Siemens SIMATIC CN 4100 siemens:simatic_cn_4100 (from the name)	before V5.0	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.19.323 before 4.20; from 5.4.285 before 5.5; from 5.10.229 before 5.10.241; from 5.15.170 before 5.15.190; from 6.1.115 before 6.1.149; from 6.6.59 before 6.6.103; from 6.11.6 before 6.12; from 6.12.1 before 6.12.43; and 7 more ranges	NVD
debian debian_linux debian:debian_linux	11.0	NVD

References

References

https://git.kernel.org/stable/c/3ca41ab55d23a0aa71661a5a56a8f06c11db90dc	patch
https://git.kernel.org/stable/c/3467c4ebb334658c6fcf3eabb64a6e8b2135e010	patch
https://git.kernel.org/stable/c/4eff1e57a8ef98d70451b94e8437e458b27dd234	patch
https://git.kernel.org/stable/c/2a70cbd1aef8b8be39992ab7b776ce1390091774	patch
https://git.kernel.org/stable/c/d036104947176d030bec64792d54e1b4f4c7f318	patch
https://git.kernel.org/stable/c/5276896e6923ebe8c68573779d784aaf7d987cce	patch
https://git.kernel.org/stable/c/4293f6c5ccf735b26afeb6825def14d830e0367b	patch
https://git.kernel.org/stable/c/33caa208dba6fa639e8a92fd0c8320b652e5550c	patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	third-party-advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	third-party-advisory
1–10 of 11

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.