CVE-2026-64384
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix change notify replay double-free 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 change notify replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_notify_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 · 38th 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/145f820dcbb2cced374f2532f8a61a44dce4a615Patch
- https://git.kernel.org/stable/c/52af1975f0dfae990c5a0e85872cc41be0e88a68Patch
- https://git.kernel.org/stable/c/5821f9dbb8b5b24391850a13418e633edd0fb003Patch
- https://git.kernel.org/stable/c/901891513951bc8322ece754863909ea45af95c6Patch
- https://git.kernel.org/stable/c/d684f4134998085702009b94c35c2003fc9e72d3Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.