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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          "lang": "en",
          "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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            "version": "3.1"
          },
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              "lang": "en",
              "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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      "title": "Input: sur40 - fix input device registration ordering",
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    "dateUpdated": "2026-08-27T05:01:47.768Z",
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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": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-27T09:44:10+00:00",
      "cve": "CVE-2026-80559",
      "id": "CVE-2026-80559",
      "initial_release_date": "2026-08-26T00:00:00+00:00",
      "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"
    }
  }
}



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  • 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.