Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8df4bcdb0a4232192b2445256c39b787d58ef14d before f0ff7f12398e85b3a11745ff7feab6246f3d75c2; affected c8efcc786146a951091588e5fa7e3c754850cb3c before 4db3dcac84c2f14a45ae201efb38de1fb1bfc009; affected c8efcc786146a951091588e5fa7e3c754850cb3c before ce2e164c1c51c3f7813b80f8c926836e896bcbb3; affected c8efcc786146a951091588e5fa7e3c754850cb3c before 97a0cd55283b4e63fd92804da91c8d9896adcad9; affected c8efcc786146a951091588e5fa7e3c754850cb3c before 1baff47b81f94f9231c91236aa511420d0e266b9; affected 6.6.32 before 6.6.157 |
| Linux / Linux | affected 6.9; unaffected 0 before 6.9; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2
- https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009
- https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3
- https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9
- https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9