Bug 2507035 (CVE-2026-64385) - CVE-2026-64385 kernel: Kernel SMB client: Double-free vulnerability allows remote denial of service or privilege escalation
Summary: CVE-2026-64385 kernel: Kernel SMB client: Double-free vulnerability allows re...
Keywords:
Status: NEW
Alias: CVE-2026-64385
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: 2026-10-08 09:50 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-2026:76739 0 None None None 2026-10-08 09:50:14 UTC
Red Hat Product Errata RHSA-2026:77219 0 None None None 2026-10-08 07:23:14 UTC
Red Hat Product Errata RHSA-2026:77634 0 None None None 2026-10-07 15:42:26 UTC

Description OSIDB Bzimport 2026-07-25 10:01:38 UTC 
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.
Comment 1 Mauro Matteo Cascella 2026-07-28 15:58:25 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026072526-CVE-2026-64385-80b2@gregkh/T
Comment 5 Jon Orris 2026-10-07 15:42:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:77634 https://access.redhat.com/errata/RHSA-2026:77634
Comment 6 Jon Orris 2026-10-08 07:23:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:77219 https://access.redhat.com/errata/RHSA-2026:77219
Comment 7 Jon Orris 2026-10-08 09:50:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:76739 https://access.redhat.com/errata/RHSA-2026:76739
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