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CVE Record

CVE-2025-40011: drm/gma500: Fix null dereference in hdmi teardown

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2025-40011 is a Linux kernel bug in the gma500 graphics driver. During HDMI teardown, the driver can clear device data and then try to use it, causing a null pointer dereference. The likely business impact is system instability or crash on affected hardware, not confirmed remote compromise.

Executive priority

Treat this as a targeted kernel stability issue. It deserves inclusion in routine Linux patch cycles, with higher urgency only for environments that depend on affected gma500 hardware or have observed related crashes.

Technical view

The flaw is in drm/gma500 HDMI teardown. pci_set_drvdata clears pdev->driver_data before oaktrail_hdmi_i2c_exit retrieves driver data and extracts i2c_dev. Kernel stable fixes reorder the calls to avoid dereferencing NULL. The source does not provide CVSS, CWE, or exploitability details.

Likely exposure

Exposure appears limited to Linux systems using the gma500/Oaktrail HDMI driver path. Distribution kernels may already include backports, so affected status must be checked against vendor kernel packages and the referenced stable commits.

Exploitation context

The bundle shows KEV is false and provides no cited evidence of active exploitation or public weaponization. Based on the described teardown path, practical impact appears tied to driver/device cleanup conditions rather than broad network exposure.

Researcher notes

Evidence is limited to the CVE description and kernel stable commit references. No CVSS, CWE, PoC, or exploitation claim is provided. The root cause is teardown ordering after driver_data is cleared.

Mitigation direction

  • Apply Linux vendor kernel updates that include the referenced stable fixes.
  • Confirm distribution advisories before assuming upstream version numbers map directly to exposure.
  • Where patching is delayed, reduce reliance on affected gma500/Oaktrail HDMI hardware paths.
  • Prioritize normal kernel maintenance unless affected hardware is business-critical.

Validation and detection

  • Inventory Linux systems with the gma500 DRM driver enabled or loaded.
  • Check whether the running kernel includes one of the referenced stable commits or a vendor backport.
  • Review crash logs for null dereference traces involving oaktrail_hdmi_i2c_exit or gma500 teardown.
  • Validate fixed kernels in staging before production rollout.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2025-40011 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
9Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bb, 1b082ccf5901108d3acd860a73d8c0442556c0bbunaffected
LinuxLinux3.3, 0, 5.4.300, 5.10.245, 5.15.194, 6.1.155, 6.6.109, 6.12.50, 6.16.10, 6.17affected
Weakness

CWE details

No CWE listed

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