Bug 2507287 (CVE-2026-64384) - CVE-2026-64384 kernel: smb: client: fix change notify replay double-free
Summary: CVE-2026-64384 kernel: smb: client: fix change notify replay double-free
Keywords:
Status: NEW
Alias: CVE-2026-64384
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-25 10:14 UTC by OSIDB Bzimport
Modified: 2026-09-08 09:25 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:61887 0 None None None 2026-09-01 07:31:07 UTC
Red Hat Product Errata RHSA-2026:64808 0 None None None 2026-09-08 09:25:30 UTC

Description OSIDB Bzimport 2026-07-25 10:14:39 UTC 
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.
Comment 1 TEJ RATHI 2026-07-27 07:48:43 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072526-CVE-2026-64384-a6b7@gregkh/T
Comment 5 errata-xmlrpc 2026-09-01 07:31:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:61887 https://access.redhat.com/errata/RHSA-2026:61887
Comment 6 errata-xmlrpc 2026-09-08 09:25:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:64808 https://access.redhat.com/errata/RHSA-2026:64808
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