Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb2_open during durable reconnect In smb2_open, the call to ksmbd_put_durable_fd(fp) drops the reference to the durable file descriptor early during the durable reconnect process. If an error occurs subsequently (eg, ksmbd_iov_pin_rsp fails) or a scavenger accesses the file, it leads to a use-after-free when accessing fp properties (eg fp->create_time). Move the single put to the end of the function below err_out2 so fp stays valid until smb2_open returns.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Linux / Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – ce2e164c1c51c3f7813b80f8c926836e896bcbb3
- Linux / Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – 97a0cd55283b4e63fd92804da91c8d9896adcad9
- Linux / Linuxc8efcc786146a951091588e5fa7e3c754850cb3c – 1baff47b81f94f9231c91236aa511420d0e266b9
- Linux / Linux8df4bcdb0a4232192b2445256c39b787d58ef14d – 8df4bcdb0a4232192b2445256c39b787d58ef14d
- Linux / Linux6.6.32 – 6.7
- Linux / Linux6.9 – 6.9
- Linux / Linux0 – 6.9
- Linux / Linux6.18.33 – 6.18.*
- Linux / Linux7.0.10 – 7.0.*
- Linux / Linux7.1 – *