CVE-2026-64385smb: client: fix double-free in SMB2_ioctl() replay
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_ioctl() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_ioctl_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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 433042a91f9373241307725b52de573933ffedbf builds before 0be4bc64882edaefaaee8d1e27d083643eb778e6; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before 96fcfc8ae7359346156e492ca610e830d2649ad6; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before 276c8efbc49f9303ac76d0d4deab7128581b0f3b; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before fc65ffb4ef1bf540da16b17c225ae51091e07d72; from 4f1fffa2376922f3d1d506e49c0fd445b023a28e before f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9; from 6.6.32 before 6.6.145 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.6.32 before 6.6.145; from 6.8.1 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 6.8; 6.8; 6.8; 6.8; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6patch
- https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6patch
- https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3bpatch
- https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72patch
- https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.