{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.1.5-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  dm: limit target bio polling to one shot  dm_poll_bio() is the -\u003epoll_bio() callback for a stacked dm device. The caller only knows about the dm queue, so it may decide to do a spinning poll if it thinks a single queue is being polled. Passing those flags unchanged to the mapped clone lets blk_mq_poll() spin on a target queue from inside dm_poll_bio().  With io_uring IOPOLL on a dm-stripe target this can keep a task in    dm_poll_bio() -\u003e bio_poll() -\u003e blk_mq_poll()  long enough to trigger an RCU CPU stall, before io_uring gets back to io_iopoll_check() and its need_resched() check.  Keep dm's -\u003epoll_bio() bounded by forcing one-shot polling for target bios. The caller can invoke dm_poll_bio() again if it wants to keep polling, and it also gets a chance to reap completions or reschedule between passes.",
  "id": "DEBIAN-CVE-2026-74392",
  "modified": "2026-09-14T16:47:36.051919309Z",
  "published": "2026-08-15T06:22:41.163Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-74392"
    }
  ],
  "upstream": [
    "CVE-2026-74392"
  ]
}