CVE-2026-53010
ksmbd: fix use-after-free in smb2_open during durable reconnect
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 24, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
8df4bcdb0a4232192b2445256c39b787d58ef14d < f0ff7f12398e85b3a11745ff7feab6246f3d75c2 c8efcc786146a951091588e5fa7e3c754850cb3c < 4db3dcac84c2f14a45ae201efb38de1fb1bfc009 c8efcc786146a951091588e5fa7e3c754850cb3c < ce2e164c1c51c3f7813b80f8c926836e896bcbb3 c8efcc786146a951091588e5fa7e3c754850cb3c < 97a0cd55283b4e63fd92804da91c8d9896adcad9 c8efcc786146a951091588e5fa7e3c754850cb3c < 1baff47b81f94f9231c91236aa511420d0e266b9 6.6.32 < 6.6.157
Linux / Linux
6.9
References
git.kernel.org: https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2 git.kernel.org: https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009 git.kernel.org: https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3 git.kernel.org: https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9 git.kernel.org: https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9