{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "06b23f92af87a84d70881b2ecaa72e00f7838264"
            },
            {
              "fixed": "ee0801aceabdf583392477baf69a290b09448b8f"
            },
            {
              "fixed": "99e6c712cc300883b8cbf03347d5359ec1a4d6dd"
            },
            {
              "fixed": "77bba61a20f1b3d206f4f90e10a7bb3cd90b9619"
            },
            {
              "fixed": "fd38b75c4b43295b10d69772a46d1c74dbd6fc81"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.9.0"
            },
            {
              "fixed": "6.12.95"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.38"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64253.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkernel/fork: clear PF_BLOCK_TS in copy_process()\n\nPF_BLOCK_TS is only set in blk_time_get_ns() when current-\u003eplug is\nnon-NULL, and blk_finish_plug() clears it via __blk_flush_plug()\nbefore NULLing the plug pointer.  copy_process() breaks the\ninvariant by inheriting PF_BLOCK_TS from the parent while resetting\nthe child's plug to NULL.\n\nClear PF_BLOCK_TS alongside that assignment so callers can rely on\n\"PF_BLOCK_TS set implies current-\u003eplug != NULL\" and dereference\ncurrent-\u003eplug unguarded.",
  "id": "CVE-2026-64253",
  "modified": "2026-07-27T03:56:20.864913657Z",
  "published": "2026-07-24T15:31:21.378Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/77bba61a20f1b3d206f4f90e10a7bb3cd90b9619"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99e6c712cc300883b8cbf03347d5359ec1a4d6dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ee0801aceabdf583392477baf69a290b09448b8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd38b75c4b43295b10d69772a46d1c74dbd6fc81"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64253.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64253"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "kernel/fork: clear PF_BLOCK_TS in copy_process()"
}