{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0"
            },
            {
              "fixed": "01a700e9278da5706c865b9ca3ae70fdb7b4531d"
            },
            {
              "fixed": "96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10"
            },
            {
              "fixed": "7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb"
            }
          ],
          "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": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98868.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: reject a kset that overruns its segment\n\ncache_replay(), the writeback worker and the GC worker read a kset of\nget_kset_onmedia_size() bytes and advance the position by it. A forged\nkey_num makes that size exceed the segment's remaining space, so the\nadvance walks past the segment and trips the cache_pos_advance() BUG_ON.\n\nReject a kset whose on-media size exceeds cache_seg_remain() before use.",
  "id": "CVE-2026-98868",
  "modified": "2026-10-19T02:30:55.137654196Z",
  "published": "2026-10-18T15:51:30.658Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/01a700e9278da5706c865b9ca3ae70fdb7b4531d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98868.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98868"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "dm-pcache: reject a kset that overruns its segment"
}