Bug 2507042 (CVE-2026-64382) - CVE-2026-64382 kernel: smb: client: fix double-free in SMB2_open() replay
Summary: CVE-2026-64382 kernel: smb: client: fix double-free in SMB2_open() replay
Keywords:
Status: NEW
Alias: CVE-2026-64382
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-25 10:01 UTC by OSIDB Bzimport
Modified: 2026-08-20 05:22 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-2026:57251 0 None None None 2026-08-20 05:22:35 UTC
Red Hat Product Errata RHSA-2026:57252 0 None None None 2026-08-20 05:13:32 UTC

Description OSIDB Bzimport 2026-07-25 10:01:58 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix double-free in SMB2_open() replay

A response-bearing attempt can return a replayable error and free its
response buffer. If SMB2_open_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 Mauro Matteo Cascella 2026-07-28 16:43:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072525-CVE-2026-64382-5957@gregkh/T
Comment 5 errata-xmlrpc 2026-08-20 05:13:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:57252 https://access.redhat.com/errata/RHSA-2026:57252
Comment 6 errata-xmlrpc 2026-08-20 05:22:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:57251 https://access.redhat.com/errata/RHSA-2026:57251
Note You need to log in before you can comment on or make changes to this bug.