{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.177-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.95-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "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:  locking/rtmutex: Skip remove_waiter() when waiter is not enqueued  syzbot triggered the following splat in remove_waiter() via FUTEX_CMP_REQUEUE_PI:    KASAN: null-ptr-deref in range [0x0000000000000a88-0x0000000000000a8f]    class_raw_spinlock_constructor    remove_waiter+0x159/0x1200 kernel/locking/rtmutex.c:1561    rt_mutex_start_proxy_lock+0x103/0x120    futex_requeue+0x10e4/0x20d0    __x64_sys_futex+0x34f/0x4d0  task_blocks_on_rt_mutex() does not arm the waiter upon deadlock detection, leaving waiter-\u003etask nil, where 3bfdc63936dd (\"rtmutex: Use waiter::task instead of current in remove_waiter()\") made this fatal.  Furthermore, rt_mutex_start_proxy_lock() should not be calling into remove_waiter() upon a successfully grabbing the rtmutex. 1a1fb985f2e2 (\"futex: Handle early deadlock return correctly\"), moved the remove_waiter() out of __rt_mutex_start_proxy_lock() (where 'ret' was only ever 0 or \u003c 0) into the wrapper. Tighten this check to account for try_to_take_rt_mutex().",
  "id": "DEBIAN-CVE-2026-53163",
  "modified": "2026-09-14T16:47:41.266443074Z",
  "published": "2026-06-25T09:16:33.703Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-53163"
    }
  ],
  "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-2026-53163"
  ]
}