{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64384",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-64384"
  ],
  "published": "2026-07-25T08:51:45Z",
  "summary": "smb: client: fix change notify replay double-free",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix change notify replay double-free\n\nA response-bearing attempt can return a replayable error and free its\nresponse buffer. If SMB2_notify_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:N/S:U/C:H/I:H/A:H"
    }
  ],
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    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64384"
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      "url": "https://git.kernel.org/stable/c/5821f9dbb8b5b24391850a13418e633edd0fb003"
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    "upstream_modified": "2026-08-17T05:24:08Z",
    "severity": {
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      "scenario": "AV:N - A malicious SMB server can return a replayable response and then force reconnect failure over the network, causing the client to free stale response state twice.\nAC:L - The peer controls both prerequisites by returning a status such as STATUS_RETRY and then disconnecting or refusing reconnection; repeated attempts make the scheduling window attacker-controllable.\nPR:N - The malicious SMB peer requires no account, capability, or other privilege on the vulnerable client; the established client session does not grant the attacker privileges on that host.\nUI:N - An ordinary automated CIFS workload can maintain an outstanding change-notify request, after which the remote peer completes the trigger without human involvement.\nS:U - Exploitation compromises the kernel and resources governed by the same host security authority, without crossing a separate virtualization or sandbox boundary.\nC:H - The double-free corrupts the CIFS response-buffer slab or mempool, permitting overlapping live objects and freelist manipulation that can support disclosure of arbitrary kernel memory.\nI:H - The heap corruption can provide attacker-influenced writes through aliased request and response buffers or freelist poisoning, potentially enabling kernel control-flow hijacking.\nA:H - Hardened allocators can immediately panic on the consecutive double-free, while unhardened allocators can crash later through freelist corruption."
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}