drm/rockchip: inno-hdmi: Switch to drmm_kzalloc()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74422
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:44 UTC
Updated2026-08-15 06:22:44 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/rockchip: inno-hdmi: Switch to drmm_kzalloc() Driver makes use of drmm_encoder_init() to initialize the encoder and automatically handle the cleanup by registering drm_encoder_cleanup() with drmm_add_action(). However, the internal structure containing the encoder part gets allocated with devm_kzalloc(), which happens while component_bind_all() is being called from Rockchip DRM driver. The component framework further ensures it is deallocated as part of releasing all the resources claimed during bind, which is triggered from component_unbind_all(). When the reference to the DRM device gets eventually dropped via drm_dev_put() in rockchip_drm_unbind(), drmm_encoder_alloc_release() attempts to access the now released encoder structure, leading to use-after-free. Ensure driver's internal structure is still reachable on encoder cleanup by switching from a device-managed allocation to a drm-managed one.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 969325a2597ebc4cb001a92992f06f698ab2b467 195ab348af4b2bdf5988f9397059317bb68fd797 git Not specified
CNA Linux Linux affected 969325a2597ebc4cb001a92992f06f698ab2b467 3cc50e7f73fcf79f28660b9d91566b13cb62e520 git Not specified
CNA Linux Linux affected 7.0 Not specified
CNA Linux Linux unaffected 7.0 semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/3cc50e7f73fcf79f28660b9d91566b13cb62e520 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/195ab348af4b2bdf5988f9397059317bb68fd797 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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