Platform device leak in Linux kernel MediaTek DRM driver
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from CNA.
Summary
The Linux kernel from 6.4 leaks a platform device in its MediaTek DRM driver. When the driver's probe step fails, or when the driver is removed, the OVL adaptor platform device that was registered for the display pipeline stays registered.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
Description from the CNA
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Fix ovl adaptor platform device leak mtk_drm_probe() creates an OVL adaptor platform device with platform_device_register_data() when the display pipeline requires the OVL adaptor. If a later initialization step fails, the probe error path releases the DRM resources without unregistering the already registered OVL adaptor device. The normal remove path likewise leaves the device registered after the DRM driver is unbound. Keep track of whether the OVL adaptor was successfully registered and unregister it on probe failure. Also recover the platform device from the stored DDP component device and unregister it during normal removal. The issue was identified by a static analysis tool I developed and confirmed by manual review.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
Update the Linux kernel to 6.6.160, 6.12.113, 6.18.56, 7.2.10 or 7.3, depending on the release branch in use.
Written with Claude Haiku 5.5 from the sources below · 2026-11-07
- Fix · CNA Linux (Linux) Fixed in 6.6.160, 6.12.113, 6.18.56, 7.2.10, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-18 Threatist record created from CVE-2026-98782
- 2026-10-18 Alias added: GHSA-cpv8-j2cq-v3fc
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-10-21 Fix available: Linux/Linux@03fb1c657028cb9f189b400f3adb46e3ba676aa5, Linux/[email protected] · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-24 Affected versions changed · Red Hat
- 2026-10-24 CVSS score added · Red Hat
- 2026-11-07 Affected versions changed · Red Hat
References
Other 5
- https://git.kernel.org/stable/c/03fb1c657028cb9f189b400f3adb46e3ba676aa5
- https://git.kernel.org/stable/c/3d85bd738aba61df14dfaf8fe638e2172d8427bf
- https://git.kernel.org/stable/c/629458b7e49559593823e351535294db17331be7
- https://git.kernel.org/stable/c/8e3a350075b556f2fed4517705935bfee4529fb6
- https://git.kernel.org/stable/c/048739be3e9cacae5301b68245668002fe6f0ce5
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Sources
- CVE-2026-98782 · CVE Program
- CVE-2026-98782 · NVD
- FIRST EPSS
- GHSA-cpv8-j2cq-v3fc · GitHub Advisory Database · CC BY 4.0
- CVE-2026-98782 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences