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CVE-2026-53010

9.8 · CRITICAL

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 re…

Published Jun 24, 2026CWE-416EPSS 0.44%

Overview

CVE-2026-53010 is a critical-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9Refgit.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9Refgit.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53010?

CVE-2026-53010 is a critical-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-53010?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-53010?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53010?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53010 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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