{
  "cveId": "CVE-2026-98073",
  "url": "https://patchblox.com/security/cve/CVE-2026-98073",
  "summary": "CVE-2026-98073 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-98073, released October 2, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: Remove conflicting altnames for dying netns in __dev_change_net_namespace().  syzbot reported the warning in cfg80211_pernet_exit(). [0]  The repro does the following:    1. create two device in root netns and non-root netns   2. assign the same altname for the two devices   3. remove the non-root netns  Since commit 7663d522099e (\u0022net: check for altname conflicts when changing netdev\u0027s netns\u0022), cfg80211_switch_netns() and cfg802154_switch_netns() fail if init_net has a device with the conflicting altname.  default_device_exit_net() had the same issue and commit d09486a04f5d (\u0022net: fix removing a namespace with conflicting altnames\u0022) fixed it.  cfg80211_pernet_exit() and cfg802154_pernet_exit() need the same fix.  Let\u0027s generalise the fix by removing conflicting altnames for dying netns in __dev_change_net_namespace().  [0]: cfg80211_switch_netns(rdev, \u0026init_net) WARNING: net/wireless/core.c:1871 at cfg80211_pernet_exit\u002B0xd5/0x120 net/wireless/core.c:1871, CPU#1: kworker/u8:9/1160 Modules linked in: CPU: 1 UID: 0 PID: 1160 Comm: kworker/u8:9 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: netns cleanup_net RIP: 0010:cfg80211_pernet_exit\u002B0xd5/0x120 net/wireless/core.c:1871 Code: e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 b4 ef 0e f7 4d 8b 36 49 81 fe 20 10 4a 90 74 12 e8 03 3d 9f f6 eb 85 e8 fc 3c 9f f6 90 \u003C0f\u003E 0b 90 eb cc e8 f1 3c 9f f6 eb 05 e8 ea 3c 9f f6 5b 41 5c 41 5e RSP: 0018:ffffc900057a78f0 EFLAGS: 00010293 RAX: ffffffff8b287154 RBX: ffff88807ba72780 RCX: ffff8880213e8000 RDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000 RBP: 00000000ffffffef R08: ffffffff9024cc67 R09: 0000000000000000 R10: fffff52000af4eb0 R11: fffffbfff204998d R12: dffffc0000000000 R13: ffffffff904a1080 R14: ffff888144ed0008 R15: ffff888144ed0e20 FS:  0000000000000000(0000) GS:ffff888124de6000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005642de0a8a70 CR3: 000000007a40c000 CR4: 00000000003526f0 Call Trace:  \u003CTASK\u003E  ops_exit_list net/core/net_namespace.c:200 [inline]  ops_undo_list\u002B0x43d/0x8d0 net/core/net_namespace.c:253  cleanup_net\u002B0x572/0x810 net/core/net_namespace.c:706  process_one_work kernel/workqueue.c:3387 [inline]  process_scheduled_works\u002B0xc3d/0x1630 kernel/workqueue.c:3470  worker_thread\u002B0xa47/0xfb0 kernel/workqueue.c:3551  kthread\u002B0x38b/0x480 kernel/kthread.c:436  ret_from_fork\u002B0x514/0xb70 arch/x86/kernel/process.c:158  ret_from_fork_asm\u002B0x1a/0x30 arch/x86/entry/entry_64.S:245  \u003C/TASK\u003E",
  "published": "2026-09-25T11:17:36Z",
  "severity": "Important",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00163,
  "epssPercentile": 0.05549,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98073",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-98073",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98073",
      "released": "2026-10-02T21:04:56Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.7-1",
      "fix": "DEBIAN-CVE-2026-98073",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98073",
      "released": "2026-10-02T21:04:56Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}