{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  dm-pcache: only hand out initialized cache segments  get_cache_segment() scans the segment map up to cache-\u003en_segs, the physical device segment count, but cache_segs_init() only initializes the first cache_info-\u003en_segs segments. A crafted image with cache_info-\u003en_segs smaller than the device count leaves the remaining pcache_cache_segment structs zeroed (segment.data == NULL), and the allocator can hand one to cache_kset_close(), which writes through the returned segment's data pointer with no NULL check.  Bound the allocator's search to cache_info-\u003en_segs so only initialized segments are ever returned. A conforming cache sets n_segs equal to the device segment count, so this rejects nothing legitimate.",
  "id": "DEBIAN-CVE-2026-80956",
  "modified": "2026-09-12T08:47:28.867992628Z",
  "published": "2026-09-11T20:19:01.410Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-80956"
    }
  ],
  "upstream": [
    "CVE-2026-80956"
  ]
}