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CVE-2026-80559 (GCVE-0-2026-80559)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-27 05:01
VLAI
Title
Input: sur40 - fix input device registration ordering
Summary
In 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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < dab741c9da72102a37cc1020a929051b7c45f9fb (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < 764b507be7b51787e1f577ca3bf0bab7efe81ff8 (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < 3e8ed76a4f3572e637653f0654cccdf617903231 (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < 83aa12f9f2468a4fbef027c09224dc1011850fb0 (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < 5c1c5227c93f18cd329dd754b4df5e0e2daece1e (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa (git)
Affected: e831cd251fb91d6c25352d322743db0d17ea11dd , < 9da976eb649c9e2f588a4499410e4d8af687925f (git)
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Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 5.10.266 , ≤ 5.10.* (semver)
Unaffected: 5.15.217 , ≤ 5.15.* (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.153 , ≤ 6.6.* (semver)
Unaffected: 6.12.105 , ≤ 6.12.* (semver)
Unaffected: 6.18.46 , ≤ 6.18.* (semver)
Unaffected: 7.1.10 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: sur40 - fix input device registration ordering\n\nIn sur40_probe(), input_register_device() was previously called early before\nthe V4L2 video device and vb2_queue components were fully initialized. If\nuserspace opened the input device immediately upon registration, sur40_open()\nwould trigger and start the sur40_poll() worker thread. This worker thread\ninvokes sur40_process_video() and accesses the uninitialized vb2_queue\nstructure, leading to a data race and potential system crash.\n\nFurthermore, if V4L2 or video registration failed after input_register_device()\nsucceeded, the error path fell through to calling input_free_device() on a\nsuccessfully registered device instead of input_unregister_device(), corrupting\ninput core state.\n\nMove input_register_device() to the very end of sur40_probe(). This ensures\nthe V4L2 and video queue structures are fully initialized before polling can\nstart, and naturally resolves the error path bug since input_free_device()\nis now only called when input registration has not yet occurred.\n\nTo maintain strict LIFO (Last-In, First-Out) teardown ordering, also move\ninput_unregister_device() to the very beginning of sur40_disconnect(). This\nguarantees that the input polling worker thread is stopped before V4L2\nvideo components or control handlers are unregistered."
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              "value": "AV:L - Exploitation is via open() on /dev/input/eventX (evdev -\u003e input_open_device -\u003e sur40_open -\u003e sur40_poll -\u003e sur40_process_video) racing sur40_probe() before vb2_queue_init(); on permanently installed PixelSense/SUR40 kiosk tables no physical USB access is needed at attack time.\nAC:L - The attacker controls both sides of the race by monitoring udev/inotify for the new input node and immediately opening it during USB hotplug or reboot probe; polling starts synchronously in input_dev_poller_start, making the uninitialized vb2_queue access reliably triggerable without uncontrollable kernel preconditions.\nPR:L - Triggering sur40_open requires only local userspace access to the evdev node (typically membership in the input group or equivalent kiosk-app privileges opening /dev/input/event*), not real root in the init namespace; user namespaces cannot substitute for this device access.\nUI:N - No victim interaction is required beyond the attacker\u0027s own actions; they can open the input device themselves (or rely on an auto-opening compositor during reconnect) and time the race during probe without needing another user to touch the screen or perform any action.\nS:U - Impact is confined to kernel memory corruption and crashes within the host input/USB driver context on the same system; it does not cross VM, container, or IOMMU security boundaries despite potential local privilege escalation as a follow-on.\nC:H - Concurrent access to a partially initialized vb2_queue is a kernel data race that can read uninitialized queue state, and the probe error path calls input_free_device() on a registered device, corrupting input-core linked lists\u2014both are memory-corruption primitives leverageable for kernel information disclosure.\nI:H - The input_free_device() misuse corrupts global input-core list state (definite kernel structure corruption), and racing poll against vb2_queue_init can invoke vb2_buffer_done and list operations on uninitialized queue internals, enabling exploitable heap/control-structure writes.\nA:H - The fix commit explicitly cites a data race on the uninitialized vb2_queue leading to system crash; corrupting input-core registration state or racing teardown during USB disconnect can cause kernel oops/panic and deny service on interactive SUR40/PixelSense deployments."
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This worker thread\\ninvokes sur40_process_video() and accesses the uninitialized vb2_queue\\nstructure, leading to a data race and potential system crash.\\n\\nFurthermore, if V4L2 or video registration failed after input_register_device()\\nsucceeded, the error path fell through to calling input_free_device() on a\\nsuccessfully registered device instead of input_unregister_device(), corrupting\\ninput core state.\\n\\nMove input_register_device() to the very end of sur40_probe(). This ensures\\nthe V4L2 and video queue structures are fully initialized before polling can\\nstart, and naturally resolves the error path bug since input_free_device()\\nis now only called when input registration has not yet occurred.\\n\\nTo maintain strict LIFO (Last-In, First-Out) teardown ordering, also move\\ninput_unregister_device() to the very beginning of sur40_disconnect(). This\\nguarantees that the input polling worker thread is stopped before V4L2\\nvideo components or control handlers are unregistered.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/input/touchscreen/sur40.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"dab741c9da72102a37cc1020a929051b7c45f9fb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"764b507be7b51787e1f577ca3bf0bab7efe81ff8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"3e8ed76a4f3572e637653f0654cccdf617903231\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"83aa12f9f2468a4fbef027c09224dc1011850fb0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"5c1c5227c93f18cd329dd754b4df5e0e2daece1e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e831cd251fb91d6c25352d322743db0d17ea11dd\",\"lessThan\":\"9da976eb649c9e2f588a4499410e4d8af687925f\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/input/touchscreen/sur40.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.266\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.217\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.153\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.105\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.46\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.10\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3e8ed76a4f3572e637653f0654cccdf617903231\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c1c5227c93f18cd329dd754b4df5e0e2daece1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/764b507be7b51787e1f577ca3bf0bab7efe81ff8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/83aa12f9f2468a4fbef027c09224dc1011850fb0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9da976eb649c9e2f588a4499410e4d8af687925f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/beb9b0bd6e6e23f5e9e42b7ef890a50f57f1f3aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cd4ecce2fd87760c0ad9a9d28c9fc62ea1dbfd3d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dab741c9da72102a37cc1020a929051b7c45f9fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
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      "current_release_date": "2026-08-27T09:44:10+00:00",
      "cve": "CVE-2026-80559",
      "id": "CVE-2026-80559",
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      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Input: sur40 - fix input device registration ordering",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80559.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T00:49:57Z",
      "cve": "CVE-2026-80559",
      "id": "CVE-2026-80559",
      "initial_release_date": "2026-08-31T13:28:20Z",
      "product_status:known_affected": "265",
      "product_status:known_not_affected": "88",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-80559",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80559.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.