8.8

CVE-2025-22040

ksmbd: fix session use-after-free in multichannel connection

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix session use-after-free in multichannel connection

There is a race condition between session setup and
ksmbd_sessions_deregister. The session can be freed before the connection
is added to channel list of session.
This patch check reference count of session before freeing it.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.15 < 6.1.134
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.87
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.23
Linux ≫ Linux Kernel Version >= 6.13 < 6.13.11
Linux ≫ Linux Kernel Version >= 6.14 < 6.14.2
Debian ≫ Debian Linux Version11.0
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.18% 0.395
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
416baaa9-dc9f-4396-8d5f-8c081fb06d67 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.