Bug 2439866 (CVE-2026-23132) - CVE-2026-23132 kernel: drm/bridge: synopsys: dw-dp: fix error paths of dw_dp_bind
Summary: CVE-2026-23132 kernel: drm/bridge: synopsys: dw-dp: fix error paths of dw_dp_...
Keywords:
Status: NEW
Alias: CVE-2026-23132
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-14 16:02 UTC by OSIDB Bzimport
Modified: 2026-02-16 12:24 UTC (History)
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Description OSIDB Bzimport 2026-02-14 16:02:26 UTC
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.


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