Bug 2396389 (CVE-2023-53377) - CVE-2023-53377 kernel: cifs: prevent use-after-free by freeing the cfile later
Summary: CVE-2023-53377 kernel: cifs: prevent use-after-free by freeing the cfile later
Keywords:
Status: NEW
Alias: CVE-2023-53377
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-18 14:02 UTC by OSIDB Bzimport
Modified: 2025-09-24 16:52 UTC (History)
0 users

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2025-09-18 14:02:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

cifs: prevent use-after-free by freeing the cfile later

In smb2_compound_op we have a possible use-after-free
which can cause hard to debug problems later on.

This was revealed during stress testing with KASAN enabled
kernel. Fixing it by moving the cfile free call to
a few lines below, after the usage.
Comment 1 Keith Grant 2025-09-18 16:33:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025091856-CVE-2023-53377-baaf@gregkh/T
Note You need to log in before you can comment on or make changes to this bug.