9.8

CVE-2026-43379

ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close()

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.6.32 < 6.6.130
Linux ≫ Linux Kernel Version >= 6.9 < 6.12.78
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.19
Linux ≫ Linux Kernel Version >= 6.19 < 6.19.9
Linux ≫ Linux Kernel Version7.0 Updaterc1
Linux ≫ Linux Kernel Version7.0 Updaterc2
Linux ≫ Linux Kernel Version7.0 Updaterc3
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.44% 0.353
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/bf4d66d72e4a9e268c1012c331ce9eaedb5e2086
Patch
https://git.kernel.org/stable/c/960699317d39f46611f4ebeb69edc567c1f4e6b6
Patch
https://git.kernel.org/stable/c/dbbd328cf58261ca239756fe1c0d10c9518d3399
Patch
https://git.kernel.org/stable/c/b3568347c51c46e2cabc356bc34676df98296619
Patch
https://git.kernel.org/stable/c/eac3361e3d5dd8067b3258c69615888eb45e9f25
Patch