In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close() opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is being accessed after rcu_read_unlock() has been called. This creates a race condition where the memory could be freed by a concurrent writer between the unlock and the subsequent pointer dereferences (opinfo->is_lease, etc.), leading to a use-after-free.
History

Tue, 19 May 2026 20:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
CPEs cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*

Mon, 11 May 2026 07:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Sat, 09 May 2026 03:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Sat, 09 May 2026 00:15:00 +0000


Fri, 08 May 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Fri, 08 May 2026 14:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close() opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is being accessed after rcu_read_unlock() has been called. This creates a race condition where the memory could be freed by a concurrent writer between the unlock and the subsequent pointer dereferences (opinfo->is_lease, etc.), leading to a use-after-free.
Title ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-23T16:06:53.273Z

Reserved: 2026-05-01T14:12:56.006Z

Link: CVE-2026-43379

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-05-08T15:16:49.100

Modified: 2026-05-19T19:56:32.510

Link: CVE-2026-43379

cve-icon Redhat

Severity :

Publid Date: 2026-05-08T00:00:00Z

Links: CVE-2026-43379 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-19T21:30:14Z