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CVE-2026-72492

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in same_client_has_lease() same_client_has_lease() returns an opinfo pointer from ci->m_op_list after…

Published Aug 15, 2026EPSS 0.64%

Overview

CVE-2026-72492 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix use-after-free in same_client_has_lease()

same_client_has_lease() returns an opinfo pointer from ci->m_op_list

after dropping ci->m_lock without taking a reference.

smb_grant_oplock() then dereferences that pointer in copy_lease() and

when checking breaking_cnt. A concurrent close can remove the old lease

from ci->m_op_list and drop the last reference before the caller uses

the returned pointer, leading to a use-after-free.

Take a reference when same_client_has_lease() selects an existing lease,

drop any previous match while scanning, and release the returned

reference in smb_grant_oplock() after copying the lease state.

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/09634cd055d9bd8dd167995ea52bcd8028dd5dacRefgit.kernel.org/stable/c/0ff82a9cf9312678d8bc4edeef0b6e82659ac12aRefgit.kernel.org/stable/c/35d3d6ff2bc1e7aaecb15d5377ebbd6227acae0dRefgit.kernel.org/stable/c/65b655f65c3ca1ab5d598d3832bb0ff531725858Refgit.kernel.org/stable/c/79c7c59bb519db6f5a2a151965e825ec725614ccRefgit.kernel.org/stable/c/7c3264d273d524aa6adcce23c01087271f13586fRefgit.kernel.org/stable/c/aaa3bb2bbf2ccbfea9e4e0b9dabf3afc60b50cd0

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72492?

CVE-2026-72492 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-72492?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-72492?

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-2026-72492?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72492 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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