{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.4-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  mm/slab: return NULL early from kmalloc_nolock() in NMI on UP  On UP kernels (!CONFIG_SMP), spin_trylock() is a no-op that unconditionally succeeds even when the lock is already held. As a result, kmalloc_nolock() called from NMI context can re-enter the slab allocator and acquire n-\u003elist_lock that the interrupted context is already holding, corrupting slab state.  With CONFIG_DEBUG_SPINLOCK on UP, the following BUG is triggered with the slub_kunit test module:    BUG: spinlock trylock failure on UP on CPU#0, kunit_try_catch/243   [...]   Call Trace:    \u003cNMI\u003e    dump_stack_lvl+0x3f/0x60    do_raw_spin_trylock+0x41/0x50    _raw_spin_trylock+0x24/0x50    get_from_partial_node+0x120/0x4d0    ___slab_alloc+0x8a/0x4c0    kmalloc_nolock_noprof+0x164/0x310    [...]    \u003c/NMI\u003e  Fix this by returning NULL early when invoked from NMI on a UP kernel.",
  "id": "DEBIAN-CVE-2026-46029",
  "modified": "2026-09-14T16:47:44.415322966Z",
  "published": "2026-05-27T14:17:21.563Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-46029"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-46029"
  ]
}