CVE-2026-53010

CRITICAL

ksmbd: fix use-after-free in smb2_open during durable reconnect

Title source: cna
STIX 2.1

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.

Scores

CVSS v3 9.8
EPSS 0.0043
EPSS Percentile 35.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

Status published
Products (12)
linux/Kernel 6.19.0 - 7.0.10linux
linux/Kernel 6.9.0 - 6.18.33linux
Linux/Linux < 6.9
Linux/Linux 6.18.33 - 6.18.*
Linux/Linux 6.6.32 - 6.7
Linux/Linux 6.9
Linux/Linux 7.0.10 - 7.0.*
Linux/Linux 7.1
Linux/Linux 8df4bcdb0a4232192b2445256c39b787d58ef14d
Linux/Linux c8efcc786146a951091588e5fa7e3c754850cb3c - 1baff47b81f94f9231c91236aa511420d0e266b9
... and 2 more
Published Jun 24, 2026
Tracked Since Jun 24, 2026