CVE-2026-64385
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.46% probability · 39th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0be4bc64882edaefaaee8d1e27d083643eb778e6Patch
- https://git.kernel.org/stable/c/276c8efbc49f9303ac76d0d4deab7128581b0f3bPatch
- https://git.kernel.org/stable/c/96fcfc8ae7359346156e492ca610e830d2649ad6Patch
- https://git.kernel.org/stable/c/f9bbadb6c94583e3b4af1afc449bfceb1d1ddec9Patch
- https://git.kernel.org/stable/c/fc65ffb4ef1bf540da16b17c225ae51091e07d72Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.