Linux Kernel up to 6.18.7 dw_dp_bind privilege escalation

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.18.7 and classified as problematic. Impacted is the function dw_dp_bind. Performing a manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2026-23132. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 6.18.7. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/bridge: synopsys: dw-dp: fix error paths of dw_dp_bind Fix several issues in dw_dp_bind() error handling: 1. Missing return after drm_bridge_attach() failure - the function continued execution instead of returning an error. 2. Resource leak: drm_dp_aux_register() is not a devm function, so drm_dp_aux_unregister() must be called on all error paths after aux registration succeeds. This affects errors from: - drm_bridge_attach() - phy_init() - devm_add_action_or_reset() - platform_get_irq() - devm_request_threaded_irq() 3. Bug fix: platform_get_irq() returns the IRQ number or a negative error code, but the error path was returning ERR_PTR(ret) instead of ERR_PTR(dp->irq). Use a goto label for cleanup to ensure consistent error handling.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-23132 since 01/13/2026. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299318 (Linux Distros Unpatched Vulnerability : CVE-2026-23132), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.18.8 eliminates this vulnerability. Applying the patch 569ed6a73e927a34cae4ae6de1464c0737a5ec44/1a0f69e3c28477b97d3609569b7e8feb4b6162e8 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.

The vulnerability is also documented in the vulnerability database at Tenable (299318). Be aware that VulDB is the high quality source for vulnerability data.

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

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Be aware that VulDB is the high quality source for vulnerability data.

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