{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0"
            },
            {
              "fixed": "ab5dcde6fa96bc115b85f3621c60e39c66229a90"
            },
            {
              "fixed": "3e19172089ec81132a8a48e802b1034a744209f4"
            },
            {
              "fixed": "32d1809da31094ef76fd98dc1f1a8b55ca1295dd"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.18.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80962.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: validate geometry fields from on-disk cache_info\n\ncache_segs_init() iterates cache_info-\u003en_segs times indexing\ncache-\u003esegments[], which is sized to the cache device geometry, and\nget_seg_id() takes each segment id from the on-media cache_info and the\nper-segment next_seg link. Both come from cache device metadata that is\nonly CRC-protected with a fixed public seed, so whoever supplies the\ncache device on a table load (CAP_SYS_ADMIN) controls them: an oversized\nn_segs or an out-of-range id drives an out-of-bounds access of\ncache-\u003esegments[] and a wild CACHE_DEV_SEGMENT() pointer into the device\nmapping -- an out-of-bounds read and write from on-disk data.\n\nReject an n_segs that exceeds the device segment count and a segment id\nthat is out of range before either is used. Valid metadata is unaffected.",
  "id": "CVE-2026-80962",
  "modified": "2026-09-13T03:30:58.447149011Z",
  "published": "2026-09-11T19:42:28.500Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32d1809da31094ef76fd98dc1f1a8b55ca1295dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3e19172089ec81132a8a48e802b1034a744209f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab5dcde6fa96bc115b85f3621c60e39c66229a90"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80962.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80962"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "dm-pcache: validate geometry fields from on-disk cache_info"
}