Bug 2468162 (CVE-2026-43378) - CVE-2026-43378 kernel: smb: server: fix use-after-free in smb2_open()
Summary: CVE-2026-43378 kernel: smb: server: fix use-after-free in smb2_open()
Keywords:
Status: NEW
Alias: CVE-2026-43378
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-08 15:02 UTC by OSIDB Bzimport
Modified: 2026-05-08 21:12 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-05-08 15:02:25 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: server: fix use-after-free in smb2_open()

The opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is
dereferenced after rcu_read_unlock(), creating a use-after-free
window.
Comment 1 Keith Grant 2026-05-08 21:10:03 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050832-CVE-2026-43378-d7e3@gregkh/T
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