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Vulnerability record · CVE-2026-53010 · published 24 June 2026

CVE-2026-53010: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.65% · top 50.8% CWE-416 · Use after free
9.8CVSS 3.1 base score
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
14 Sep 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9 Patch
https://git.kernel.org/stable/c/4db3dcac84c2f14a45ae201efb38de1fb1bfc009
https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9 Patch
https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3 Patch
https://git.kernel.org/stable/c/f0ff7f12398e85b3a11745ff7feab6246f3d75c2

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Source: NIST National Vulnerability Database (record CVE-2026-53010), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.