CVE-2026-64386 (GCVE-0-2026-64386)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-10-19 20:38
VLAI
Title
smb: client: fix query_info() replay double-free
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:39 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6639 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 433042a91f9373241307725b52de573933ffedbf , < 100fb7c455fa86d248b8bd7bb9de757c192870b4 (git)
Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < 3c81dda84799f76b42aec598564316e2964440db (git)
Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < f1add4acb656f5a82806a1ab0e63fed3d8b1bfca (git)
Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < 89234773e8348918111aa15f6922b58cf3843364 (git)
Affected: 4f1fffa2376922f3d1d506e49c0fd445b023a28e , < 2a88561d66eb855813cf004a0abe648bbb17de5e (git)
Affected: 6.6.32 , < 6.6.145 (semver)
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Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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      "status": "final",
      "title": "kernel: smb: client: fix query_info() replay double-free",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64386.json",
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                    "timestamp": "2026-10-16T15:39:59.623479Z",
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                    "cweId": "CWE-415",
                    "description": "CWE-415 Double Free",
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                ]
              }
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            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "cveId": "CVE-2026-64386",
        "datePublished": "2026-07-25T08:50:34.729Z",
        "dateReserved": "2026-07-19T15:36:31.784Z",
        "dateUpdated": "2026-10-19T20:38:26.574Z",
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}



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