Bug 2405137 (CVE-2025-40011)

Summary: CVE-2025-40011 kernel: drm/gma500: Fix null dereference in hdmi teardown
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-20 17:24:04 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/gma500: Fix null dereference in hdmi teardown

pci_set_drvdata sets the value of pdev->driver_data to NULL,
after which the driver_data obtained from the same dev is
dereferenced in oaktrail_hdmi_i2c_exit, and the i2c_dev is
extracted from it. To prevent this, swap these calls.

Found by Linux Verification Center (linuxtesting.org) with Svacer.
Comment 1 Jon Moroney 2025-10-20 17:36:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025102003-CVE-2025-40011-f8f9@gregkh/T