CVE-2026-23132

Summary

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.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/569ed6a73e927a34cae4ae6de1464c0737a5ec44
• https://git.kernel.org/stable/c/1a0f69e3c28477b97d3609569b7e8feb4b6162e8

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