{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "433042a91f9373241307725b52de573933ffedbf"
            },
            {
              "fixed": "037511726228aaf165c7067ff2bfc88eaecdf1f3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "4f1fffa2376922f3d1d506e49c0fd445b023a28e"
            },
            {
              "fixed": "0aa97edf7c347c0f54e7e60c4740574b8120c66a"
            },
            {
              "fixed": "d15d83125007f673aec4323e1bbbaaffbe87ea13"
            },
            {
              "fixed": "b18ed621dbfceecea5539848cddcb9272c9a61e1"
            },
            {
              "fixed": "f96e1cdcb63ed3321142ff2fcdf784e32cda8fee"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.6.32"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64597.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_close() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_close_init() fails before the next send, cleanup\nretains the previous buffer type and frees that response again.\n\nReset response bookkeeping before each attempt to prevent the stale free.",
  "id": "CVE-2026-64597",
  "modified": "2026-08-09T03:30:43.012037717Z",
  "published": "2026-08-06T07:13:52.117Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/037511726228aaf165c7067ff2bfc88eaecdf1f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0aa97edf7c347c0f54e7e60c4740574b8120c66a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b18ed621dbfceecea5539848cddcb9272c9a61e1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d15d83125007f673aec4323e1bbbaaffbe87ea13"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f96e1cdcb63ed3321142ff2fcdf784e32cda8fee"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64597.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64597"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "smb: client: fix double-free in SMB2_close() replay"
}