{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0"
            },
            {
              "fixed": "8195cf3f4a82ef49d9b0651c507ed0784caf23fb"
            },
            {
              "fixed": "4822a030929e0e77aa380722dc42e3e4c9edd346"
            },
            {
              "fixed": "58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b"
            }
          ],
          "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": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93198.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: validate the persisted dirty_tail chain at load\n\nThe writeback worker follows the persisted dirty_tail chain, which is\ndecoded from the cache device independently of the key_tail chain that\ncache_replay() walks and bounds. A crafted image, whose on-media fields are\nauthenticated only by a crc32c with a fixed seed, can aim dirty_tail at a\nchain of last ksets that never terminates, so cache_writeback_fn() re-arms\nitself with no delay forever.\n\nWalk the dirty_tail chain once at load with the same hop cap cache_replay()\nuses and fail the table load with -EIO if it does not reach an end within\nn_segs hops.",
  "id": "CVE-2026-93198",
  "modified": "2026-09-19T03:30:20.610928235Z",
  "published": "2026-09-17T16:12:20.439Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4822a030929e0e77aa380722dc42e3e4c9edd346"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8195cf3f4a82ef49d9b0651c507ed0784caf23fb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93198.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93198"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "dm-pcache: validate the persisted dirty_tail chain at load"
}