{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.8-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  xfrm: serialize state GC with device state flush  The deferred-device pass in xfrm_dev_state_flush() finds states under xfrm_state_dev_gc_lock, but drops the lock before calling xfrm_dev_state_free() because the driver callback may sleep.  The device GC list does not hold an xfrm_state reference, so the state GC worker can destroy the same state concurrently.  The race can proceed as follows:    CPU 0                               CPU 1   find x on the device GC list   drop xfrm_state_dev_gc_lock   read x-\u003exso.dev                                       xfrm_state_gc_destroy(x)                                       xfrm_dev_state_free(x)                                       xfrm_state_free(x)   continue xfrm_dev_state_free(x)  Both paths can invoke the driver callback and drop the device reference. CPU 0 can also access the xfrm_state after CPU 1 has freed it.  KASAN reported:    BUG: KASAN: slab-use-after-free in xfrm_dev_state_free+0x24c/0x2a0   Read of size 8 at addr ffff88810bbaa960 by task poc/102    Call Trace:    xfrm_dev_state_free+0x24c/0x2a0    xfrm_dev_state_flush+0x353/0x400    xfrm_dev_event+0x26d/0x3a0    notifier_call_chain+0xc0/0x280    __dev_notify_flags+0x169/0x250    netif_change_flags+0xe7/0x160    dev_change_flags+0x96/0x220    devinet_ioctl+0x7f4/0x1880    Allocated by task 87:    xfrm_state_alloc+0x1e/0x5c0    xfrm_add_sa+0xe7f/0x5820    xfrm_user_rcv_msg+0x4f3/0x940    Freed by task 57:    kmem_cache_free+0xcb/0x3d0    xfrm_state_gc_task+0x4a8/0x650    process_one_work+0x63a/0x1070  Serialize xfrm_state destruction against the deferred-device pass with a mutex.  Keep xfrm_state_dev_gc_lock limited to list operations and retain the existing callback and device-reference release ordering.",
  "id": "DEBIAN-CVE-2026-98231",
  "modified": "2026-10-07T04:47:33.619808109Z",
  "published": "2026-10-06T09:18:10.540Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98231"
    }
  ],
  "upstream": [
    "CVE-2026-98231"
  ]
}