{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.13-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  xfrm: iptfs: fix ABBA deadlock in iptfs_destroy_state()  iptfs_destroy_state() calls hrtimer_cancel() while holding a spinlock that the timer callback also acquires, leading to an ABBA deadlock on SMP systems.  For the output timer (iptfs_timer):   - iptfs_destroy_state() holds x-\u003elock, calls hrtimer_cancel()   - iptfs_delay_timer() callback takes x-\u003elock  For the drop timer (drop_timer):   - iptfs_destroy_state() holds drop_lock, calls hrtimer_cancel()   - iptfs_drop_timer() callback takes drop_lock  Both timers use HRTIMER_MODE_REL_SOFT, so their callbacks run in softirq context.  When hrtimer_cancel() is called for a soft timer that is currently executing on another CPU, hrtimer_cancel_wait_running() spins on softirq_expiry_lock -- the same lock held by the softirq running the callback.  If the callback is blocked waiting for the spinlock held by the caller of hrtimer_cancel(), a circular dependency forms:    CPU 0: holds lock_A -\u003e waits for softirq_expiry_lock   CPU 1: holds softirq_expiry_lock -\u003e waits for lock_A  Fix by calling hrtimer_cancel() before acquiring the respective locks. hrtimer_cancel() is safe to call without holding any lock and will wait for any in-progress callback to complete.  For the output timer, the lock is still acquired afterwards to drain the packet queue.  For the drop timer, the lock/unlock pair is removed entirely since it only existed to serialize with the timer callback, which hrtimer_cancel() already guarantees.  Found by source code audit.",
  "id": "DEBIAN-CVE-2026-53197",
  "modified": "2026-09-14T16:47:43.745316582Z",
  "published": "2026-06-25T09:16:37.227Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53197"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-53197"
  ]
}