Input: sur40 - fix input device registration ordering

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80559
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 15:17:10 UTC
Updated2026-08-27 06:17:40 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: Input: sur40 - fix input device registration ordering In sur40_probe(), input_register_device() was previously called early before the V4L2 video device and vb2_queue components were fully initialized. If userspace opened the input device immediately upon registration, sur40_open() would trigger and start the sur40_poll() worker thread. This worker thread invokes sur40_process_video() and accesses the uninitialized vb2_queue structure, leading to a data race and potential system crash. Furthermore, if V4L2 or video registration failed after input_register_device() succeeded, the error path fell through to calling input_free_device() on a successfully registered device instead of input_unregister_device(), corrupting input core state. Move input_register_device() to the very end of sur40_probe(). This ensures the V4L2 and video queue structures are fully initialized before polling can start, and naturally resolves the error path bug since input_free_device() is now only called when input registration has not yet occurred. To maintain strict LIFO (Last-In, First-Out) teardown ordering, also move input_unregister_device() to the very beginning of sur40_disconnect(). This guarantees that the input polling worker thread is stopped before V4L2 video components or control handlers are unregistered.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001290000 probability, percentile 0.028390000 (date 2026-08-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd dab741c9da72102a37cc1020a929051b7c45f9fb git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd 764b507be7b51787e1f577ca3bf0bab7efe81ff8 git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd 3e8ed76a4f3572e637653f0654cccdf617903231 git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd 83aa12f9f2468a4fbef027c09224dc1011850fb0 git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd 5c1c5227c93f18cd329dd754b4df5e0e2daece1e git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa git Not specified
CNA Linux Linux affected e831cd251fb91d6c25352d322743db0d17ea11dd 9da976eb649c9e2f588a4499410e4d8af687925f git Not specified
CNA Linux Linux affected 4.1 Not specified
CNA Linux Linux unaffected 4.1 semver Not specified
CNA Linux Linux unaffected 5.10.266 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.217 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.184 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.153 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.105 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.46 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.10 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/dab741c9da72102a37cc1020a929051b7c45f9fb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9da976eb649c9e2f588a4499410e4d8af687925f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5c1c5227c93f18cd329dd754b4df5e0e2daece1e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/83aa12f9f2468a4fbef027c09224dc1011850fb0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3e8ed76a4f3572e637653f0654cccdf617903231 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/764b507be7b51787e1f577ca3bf0bab7efe81ff8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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