Description

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.

Classification

CVE ID: CVE-2025-22040

Affected Products

Vendor: Linux

Product: Linux, Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 5.04% (scored less or equal to compared to others)

EPSS Date: 2025-04-20 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-22040
https://git.kernel.org/stable/c/596407adb9af1ee75fe7c7529607783d31b66e7f
https://git.kernel.org/stable/c/3980770cb1470054e6400fd97668665975726737
https://git.kernel.org/stable/c/9069939d762138e232a6f79e3e1462682ed6a17d
https://git.kernel.org/stable/c/94c281721d4ed2d972232414b91d98a6f5bdb16b
https://git.kernel.org/stable/c/7dfbd4c43eed91dd2548a95236908025707a8dfd
https://git.kernel.org/stable/c/fa4cdb8cbca7d6cb6aa13e4d8d83d1103f6345db

Timeline