{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.6-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  mm/page_alloc: don't spin_trylock() in NMI on UP  Patch series \"mm/page_alloc: fixes for free_pages_nolock() on RT/UP\".  Pre-existing bugs found by Sashiko during review of this other series: https://lore.kernel.org/all/20260703-alloc-trylock-v5-0-c87b714e19d3@google.com/  I have not reproduced these bugs, and I suspect there is no real-world user that is affected by them.   This patch (of 2):  As noted in can_spin_trylock(), using this is unsafe in this context.  commit 620b46ed6ae17 (\"mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP\") fixed this on the alloc side but missed the free side.  Impact: If BPF programs using these features in NMI (probably tracing) are present on non-SMP builds this might crash the kernel and is probably exploitable by local attackers for privilege escalation.",
  "id": "DEBIAN-CVE-2026-90046",
  "modified": "2026-09-23T03:47:33.224428888Z",
  "published": "2026-09-16T11:17:17.867Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-90046"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-90046"
  ]
}