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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
27b40b7bfcd121fe13a150ffe11957630cf49246 affected < bf4d66d72e4a9e268c1012c331ce9eaedb5e2086
5fb282ba4fef8985a5acf2b32681f2ec07732561 affected < 960699317d39f46611f4ebeb69edc567c1f4e6b6
5fb282ba4fef8985a5acf2b32681f2ec07732561 affected < dbbd328cf58261ca239756fe1c0d10c9518d3399
5fb282ba4fef8985a5acf2b32681f2ec07732561 affected < b3568347c51c46e2cabc356bc34676df98296619
5fb282ba4fef8985a5acf2b32681f2ec07732561 affected < eac3361e3d5dd8067b3258c69615888eb45e9f25
Linux Linux affected
Version Status Constraints
6.9 affected —
0 unaffected < 6.9
6.6.130 unaffected ≤ 6.6.*
6.12.78 unaffected ≤ 6.12.*
6.18.19 unaffected ≤ 6.18.*
6.19.9 unaffected ≤ 6.19.*
7.0 unaffected ≤ *

No data.

No data.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/960699317d39f46611f4ebeb69edc567c1f4e6b6 cve-icon cve-icon
https://git.kernel.org/stable/c/b3568347c51c46e2cabc356bc34676df98296619 cve-icon cve-icon
https://git.kernel.org/stable/c/bf4d66d72e4a9e268c1012c331ce9eaedb5e2086 cve-icon cve-icon
https://git.kernel.org/stable/c/dbbd328cf58261ca239756fe1c0d10c9518d3399 cve-icon cve-icon
https://git.kernel.org/stable/c/eac3361e3d5dd8067b3258c69615888eb45e9f25 cve-icon cve-icon
History

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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-08T14:21:28.027Z

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

Link: CVE-2026-43379

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-43379

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-08T16:15:12Z

Weaknesses