{"id":"CVE-2025-38683","title":"hv_netvsc: Fix panic during namespace deletion with VF","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nhv_netvsc: Fix panic during namespace deletion with VF\n\nThe existing code move the VF NIC to new namespace when NETDEV_REGISTER is\nreceived on netvsc NIC. During deleti…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3eb6aa870057da9f1304db660f68b9c2eb7e856d < 3ca41ab55d23a0aa71661a5a56a8f06c11db90dc","Linux >= b7a396f76ada277d049558db648389456458af65 < 3467c4ebb334658c6fcf3eabb64a6e8b2135e010","Linux >= 4faa6e3e66b3251eb4bf5761d2f3f0f14095aaca < 4eff1e57a8ef98d70451b94e8437e458b27dd234","Linux >= 62c85b9a0dd7471a362170323e1211ad98ff7b4b < 2a70cbd1aef8b8be39992ab7b776ce1390091774","Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < d036104947176d030bec64792d54e1b4f4c7f318","Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < 5276896e6923ebe8c68573779d784aaf7d987cce","Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < 4293f6c5ccf735b26afeb6825def14d830e0367b","Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < 33caa208dba6fa639e8a92fd0c8320b652e5550c","Linux 7abd221a55a61b6b2bf0e80f850bfc0ae75c7e01","Linux 31a38a908c98aebc7a1104dab5f1ba199f234b7b","Linux 04d748d4bd2d86739b159563f257e3dc5492c88d","Linux >= 5.10.229 < 5.10.241","Linux >= 5.15.170 < 5.15.190","Linux >= 6.1.115 < 6.1.149","Linux >= 6.6.59 < 6.6.103","Linux >= 4.19.323 < 4.20","Linux >= 5.4.285 < 5.5","Linux >= 6.11.6 < 6.12","Linux 6.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:07:04.442104Z"},"published":"2025-09-04","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:12:52.601Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38683","references":[{"url":"https://git.kernel.org/stable/c/3ca41ab55d23a0aa71661a5a56a8f06c11db90dc"},{"url":"https://git.kernel.org/stable/c/3467c4ebb334658c6fcf3eabb64a6e8b2135e010"},{"url":"https://git.kernel.org/stable/c/4eff1e57a8ef98d70451b94e8437e458b27dd234"},{"url":"https://git.kernel.org/stable/c/2a70cbd1aef8b8be39992ab7b776ce1390091774"},{"url":"https://git.kernel.org/stable/c/d036104947176d030bec64792d54e1b4f4c7f318"},{"url":"https://git.kernel.org/stable/c/5276896e6923ebe8c68573779d784aaf7d987cce"},{"url":"https://git.kernel.org/stable/c/4293f6c5ccf735b26afeb6825def14d830e0367b"},{"url":"https://git.kernel.org/stable/c/33caa208dba6fa639e8a92fd0c8320b652e5550c"}],"tags":["cve.org"],"epss":0.00183,"epssPercentile":0.07931,"ingestedAt":"2026-11-05T22:38:32.010Z","slug":"CVE-2025-38683","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nhv_netvsc: Fix panic during namespace deletion with VF\n\nThe existing code move the VF NIC to new namespace when NETDEV_REGISTER is\nreceived on netvsc NIC. During deletion of the namespace,\ndefault_device_exit_batch() >> default_device_exit_net() is called. When\nnetvsc NIC is moved back and registered to the default namespace, it\nautomatically brings VF NIC back to the default namespace. This will cause\nthe default_device_exit_net() >> for_each_netdev_safe loop unable to detect\nthe list end, and hit NULL ptr:\n\n[  231.449420] mana 7870:00:00.0 enP30832s1: Moved VF to namespace with: eth0\n[  231.449656] BUG: kernel NULL pointer dereference, address: 0000000000000010\n[  231.450246] #PF: supervisor read access in kernel mode\n[  231.450579] #PF: error_code(0x0000) - not-present page\n[  231.450916] PGD 17b8a8067 P4D 0\n[  231.451163] Oops: Oops: 0000 [#1] SMP NOPTI\n[  231.451450] CPU: 82 UID: 0 PID: 1394 Comm: kworker/u768:1 Not tainted 6.16.0-rc4+ #3 VOLUNTARY\n[  231.452042] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 11/21/2024\n[  231.452692] Workqueue: netns cleanup_net\n[  231.452947] RIP: 0010:default_device_exit_batch+0x16c/0x3f0\n[  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\n[  231.454294] RSP: 0018:ff75fc7c9bf9fd00 EFLAGS: 00010246\n[  231.454610] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 61c8864680b583eb\n[  231.455094] RDX: ff1fa9f71462d800 RSI: ff75fc7c9bf9fd38 RDI: 0000000030766564\n[  231.455686] RBP: ff75fc7c9bf9fd78 R08: 0000000000000000 R09: 0000000000000000\n[  231.456126] R10: 0000000000000001 R11: 0000000000000004 R12: ff1fa9f70088e340\n[  231.456621] R13: ff1fa9f70088e340 R14: ffffffffb3f50c20 R15: ff1fa9f7103e6340\n[  231.457161] FS:  0000000000000000(0000) GS:ff1faa6783a08000(0000) knlGS:0000000000000000\n[  231.457707] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  231.458031] CR2: 0000000000000010 CR3: 0000000179ab2006 CR4: 0000000000b73ef0\n[  231.458434] Call Trace:\n[  231.458600]  <TASK>\n[  231.458777]  ops_undo_list+0x100/0x220\n[  231.459015]  cleanup_net+0x1b8/0x300\n[  231.459285]  process_one_work+0x184/0x340\n\nTo fix it, move the ns change to a workqueue, and take rtnl_lock to avoid\nchanging the netdev list when default_device_exit_net() is using it.\n\n## Affected\n\n- `Linux >= 3eb6aa870057da9f1304db660f68b9c2eb7e856d < 3ca41ab55d23a0aa71661a5a56a8f06c11db90dc`\n- `Linux >= b7a396f76ada277d049558db648389456458af65 < 3467c4ebb334658c6fcf3eabb64a6e8b2135e010`\n- `Linux >= 4faa6e3e66b3251eb4bf5761d2f3f0f14095aaca < 4eff1e57a8ef98d70451b94e8437e458b27dd234`\n- `Linux >= 62c85b9a0dd7471a362170323e1211ad98ff7b4b < 2a70cbd1aef8b8be39992ab7b776ce1390091774`\n- `Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < d036104947176d030bec64792d54e1b4f4c7f318`\n- `Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < 5276896e6923ebe8c68573779d784aaf7d987cce`\n- `Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < 4293f6c5ccf735b26afeb6825def14d830e0367b`\n- `Linux >= 4c262801ea60c518b5bebc22a09f5b78b3147da2 < 33caa208dba6fa639e8a92fd0c8320b652e5550c`\n- `Linux 7abd221a55a61b6b2bf0e80f850bfc0ae75c7e01`\n- `Linux 31a38a908c98aebc7a1104dab5f1ba199f234b7b`\n- `Linux 04d748d4bd2d86739b159563f257e3dc5492c88d`\n- `Linux >= 5.10.229 < 5.10.241`\n- `Linux >= 5.15.170 < 5.15.190`\n- `Linux >= 6.1.115 < 6.1.149`\n- `Linux >= 6.6.59 < 6.6.103`\n- `Linux >= 4.19.323 < 4.20`\n- `Linux >= 5.4.285 < 5.5`\n- `Linux >= 6.11.6 < 6.12`\n- `Linux 6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}