CVE-2025-68822 (GCVE-0-2025-68822)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:29 – Updated: 2026-01-13 15:29
VLAI?
Title
Input: alps - fix use-after-free bugs caused by dev3_register_work
Summary
In the Linux kernel, the following vulnerability has been resolved: Input: alps - fix use-after-free bugs caused by dev3_register_work The dev3_register_work delayed work item is initialized within alps_reconnect() and scheduled upon receipt of the first bare PS/2 packet from an external PS/2 device connected to the ALPS touchpad. During device detachment, the original implementation calls flush_workqueue() in psmouse_disconnect() to ensure completion of dev3_register_work. However, the flush_workqueue() in psmouse_disconnect() only blocks and waits for work items that were already queued to the workqueue prior to its invocation. Any work items submitted after flush_workqueue() is called are not included in the set of tasks that the flush operation awaits. This means that after flush_workqueue() has finished executing, the dev3_register_work could still be scheduled. Although the psmouse state is set to PSMOUSE_CMD_MODE in psmouse_disconnect(), the scheduling of dev3_register_work remains unaffected. The race condition can occur as follows: CPU 0 (cleanup path) | CPU 1 (delayed work) psmouse_disconnect() | psmouse_set_state() | flush_workqueue() | alps_report_bare_ps2_packet() alps_disconnect() | psmouse_queue_work() kfree(priv); // FREE | alps_register_bare_ps2_mouse() | priv = container_of(work...); // USE | priv->dev3 // USE Add disable_delayed_work_sync() in alps_disconnect() to ensure that dev3_register_work is properly canceled and prevented from executing after the alps_data structure has been deallocated. This bug is identified by static analysis.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 04aae283ba6a8cd4851d937bf9c6d6ef0361d794 , < ed8c61b89be0c45f029228b2913d5cf7b5cda1a7 (git)
Affected: 04aae283ba6a8cd4851d937bf9c6d6ef0361d794 , < a9c115e017b2c633d25bdfe6709dda6fc36f08c2 (git)
Affected: 04aae283ba6a8cd4851d937bf9c6d6ef0361d794 , < bf40644ef8c8a288742fa45580897ed0e0289474 (git)
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    Linux Linux Affected: 4.0
Unaffected: 0 , < 4.0 (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/mouse/alps.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ed8c61b89be0c45f029228b2913d5cf7b5cda1a7",
              "status": "affected",
              "version": "04aae283ba6a8cd4851d937bf9c6d6ef0361d794",
              "versionType": "git"
            },
            {
              "lessThan": "a9c115e017b2c633d25bdfe6709dda6fc36f08c2",
              "status": "affected",
              "version": "04aae283ba6a8cd4851d937bf9c6d6ef0361d794",
              "versionType": "git"
            },
            {
              "lessThan": "bf40644ef8c8a288742fa45580897ed0e0289474",
              "status": "affected",
              "version": "04aae283ba6a8cd4851d937bf9c6d6ef0361d794",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/input/mouse/alps.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.0"
            },
            {
              "lessThan": "4.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.64",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.3",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19-rc2",
                  "versionStartIncluding": "4.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: alps - fix use-after-free bugs caused by dev3_register_work\n\nThe dev3_register_work delayed work item is initialized within\nalps_reconnect() and scheduled upon receipt of the first bare\nPS/2 packet from an external PS/2 device connected to the ALPS\ntouchpad. During device detachment, the original implementation\ncalls flush_workqueue() in psmouse_disconnect() to ensure\ncompletion of dev3_register_work. However, the flush_workqueue()\nin psmouse_disconnect() only blocks and waits for work items that\nwere already queued to the workqueue prior to its invocation. Any\nwork items submitted after flush_workqueue() is called are not\nincluded in the set of tasks that the flush operation awaits.\nThis means that after flush_workqueue() has finished executing,\nthe dev3_register_work could still be scheduled. Although the\npsmouse state is set to PSMOUSE_CMD_MODE in psmouse_disconnect(),\nthe scheduling of dev3_register_work remains unaffected.\n\nThe race condition can occur as follows:\n\nCPU 0 (cleanup path)     | CPU 1 (delayed work)\npsmouse_disconnect()     |\n  psmouse_set_state()    |\n  flush_workqueue()      | alps_report_bare_ps2_packet()\n  alps_disconnect()      |   psmouse_queue_work()\n    kfree(priv); // FREE | alps_register_bare_ps2_mouse()\n                         |   priv = container_of(work...); // USE\n                         |   priv-\u003edev3 // USE\n\nAdd disable_delayed_work_sync() in alps_disconnect() to ensure\nthat dev3_register_work is properly canceled and prevented from\nexecuting after the alps_data structure has been deallocated.\n\nThis bug is identified by static analysis."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-13T15:29:24.703Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ed8c61b89be0c45f029228b2913d5cf7b5cda1a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/a9c115e017b2c633d25bdfe6709dda6fc36f08c2"
        },
        {
          "url": "https://git.kernel.org/stable/c/bf40644ef8c8a288742fa45580897ed0e0289474"
        }
      ],
      "title": "Input: alps - fix use-after-free bugs caused by dev3_register_work",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68822",
    "datePublished": "2026-01-13T15:29:24.703Z",
    "dateReserved": "2025-12-24T10:30:51.048Z",
    "dateUpdated": "2026-01-13T15:29:24.703Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68822\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:16:04.550\",\"lastModified\":\"2026-01-13T16:16:04.550\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nInput: alps - fix use-after-free bugs caused by dev3_register_work\\n\\nThe dev3_register_work delayed work item is initialized within\\nalps_reconnect() and scheduled upon receipt of the first bare\\nPS/2 packet from an external PS/2 device connected to the ALPS\\ntouchpad. During device detachment, the original implementation\\ncalls flush_workqueue() in psmouse_disconnect() to ensure\\ncompletion of dev3_register_work. However, the flush_workqueue()\\nin psmouse_disconnect() only blocks and waits for work items that\\nwere already queued to the workqueue prior to its invocation. Any\\nwork items submitted after flush_workqueue() is called are not\\nincluded in the set of tasks that the flush operation awaits.\\nThis means that after flush_workqueue() has finished executing,\\nthe dev3_register_work could still be scheduled. Although the\\npsmouse state is set to PSMOUSE_CMD_MODE in psmouse_disconnect(),\\nthe scheduling of dev3_register_work remains unaffected.\\n\\nThe race condition can occur as follows:\\n\\nCPU 0 (cleanup path)     | CPU 1 (delayed work)\\npsmouse_disconnect()     |\\n  psmouse_set_state()    |\\n  flush_workqueue()      | alps_report_bare_ps2_packet()\\n  alps_disconnect()      |   psmouse_queue_work()\\n    kfree(priv); // FREE | alps_register_bare_ps2_mouse()\\n                         |   priv = container_of(work...); // USE\\n                         |   priv-\u003edev3 // USE\\n\\nAdd disable_delayed_work_sync() in alps_disconnect() to ensure\\nthat dev3_register_work is properly canceled and prevented from\\nexecuting after the alps_data structure has been deallocated.\\n\\nThis bug is identified by static analysis.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a9c115e017b2c633d25bdfe6709dda6fc36f08c2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bf40644ef8c8a288742fa45580897ed0e0289474\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ed8c61b89be0c45f029228b2913d5cf7b5cda1a7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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