{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64382",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-64382"
  ],
  "published": "2026-07-25T08:51:45Z",
  "summary": "smb: client: fix double-free in SMB2_open() replay",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix double-free in SMB2_open() replay\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_open_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.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64382"
    },
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      "url": "https://git.kernel.org/stable/c/02bc2896bdc3e29362d6e40d404006944a159c25"
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    "upstream_modified": "2026-08-17T05:24:08Z",
    "severity": {
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      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:N - A malicious SMB2/SMB3 server can trigger the flaw through network-delivered CREATE error responses after a victim mounts or accesses its share.\nAC:L - The server controls the replayable status and can disconnect or refuse reconnection so the next initialization fails; it can repeat the sequence to overcome scheduling variance.\nPR:N - The attacking server needs no account or privileges on the client, because the victim supplies the mounted SMB session and initiates the request.\nUI:R - A victim must mount the malicious share or perform an operation such as statfs, ACL access, notification, or file access that causes SMB2_open() to run.\nS:U - The double-free corrupts memory within the client kernel's existing security authority and does not inherently cross a VM or IOMMU boundary.\nC:H - The double-free can produce overlapping live SMB buffers and use-after-free access, supporting kernel-memory disclosure and arbitrary-read exploitation.\nI:H - Reallocation of the freed mempool object permits attacker-controlled network data to corrupt live kernel objects or allocator metadata, enabling arbitrary writes or control-flow hijacking.\nA:H - The double-free can immediately trigger allocator diagnostics or heap corruption leading to a kernel oops or panic, and the server can repeatedly retrigger it."
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}