Linux Kernel up to 6.18.32/7.0.9 perf perf_allow_kernel hw permission

Summaryinfo

A vulnerability described as critical has been identified in Linux Kernel up to 6.18.32/7.0.9. Affected by this issue is the function perf_allow_kernel of the component perf. Executing a manipulation of the argument hw can lead to permission. This vulnerability is tracked as CVE-2026-53114. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.18.32/7.0.9. It has been declared as critical. This vulnerability affects the function perf_allow_kernel of the component perf. The manipulation of the argument hw with an unknown input leads to a permission vulnerability. The CWE definition for the vulnerability is CWE-275. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler Calling perf_allow_kernel() from the NMI context is unsafe and could be fatal. Capture the permission at event-initialization time by storing it in event->hw.flags, and have the NMI handler rely on that cached flag instead of making the call directly.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-53114 since 06/09/2026. The exploitation appears to be easy. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/24/2026). This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

Upgrading to version 6.18.33 or 7.0.10 eliminates this vulnerability. Applying the patch 2783ed2442ce69ae240b787aee6dae801cef7aec/0584e74fa2b27e9e722cfb5b579f79263df20040/b0a09142622a994c4f4088c3f61db5da87cfc711 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
• 6.18.9
• 6.18.10
• 6.18.11
• 6.18.12
• 6.18.13
• 6.18.14
• 6.18.15
• 6.18.16
• 6.18.17
• 6.18.18
• 6.18.19
• 6.18.20
• 6.18.21
• 6.18.22
• 6.18.23
• 6.18.24
• 6.18.25
• 6.18.26
• 6.18.27
• 6.18.28
• 6.18.29
• 6.18.30
• 6.18.31
• 6.18.32
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9

License

• open-source

Website

• Vendor: https://www.kernel.org/

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