HID: appletb-kbd: fix slab use-after-free bug in appletb_kbd_probe

{
  "id": "de79b740ee38dd5b6e1616125cf39e1f0d0e02c097357a317f8df9971800fbe9",
  "url": "https://osv.dev/vulnerability/CVE-2025-38378",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "HID: appletb-kbd: fix slab use-after-free bug in appletb_kbd_probe",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: HID: appletb-kbd: fix slab use-after-free bug in appletb_kbd_probe In probe appletb_kbd_probe() a \"struct appletb_kbd *kbd\" is allocated via devm_kzalloc() to store touch bar keyboard related data. Later on if backlight_device_get_by_name() finds a backlight device with name \"appletb_backlight\" a timer (kbd->inactivity_timer) is setup with appletb_inactivity_timer() and the timer is armed to run after appletb_tb_dim_timeout (60) seconds. A use-after-free is triggered when failure occurs after the timer is armed. This ultimately means probe failure occurs and as a result the \"struct appletb_kbd *kbd\" which is device managed memory is freed. After 60 seconds the timer will have expired and __run_timers will attempt to access the timer (kbd->inactivity_timer) however the kdb structure has been freed causing a use-after free. [ 71.636938] ================================================================== [ 71.637915] BUG: KASAN: slab-use-after-free in __run_timers+0x7ad/0x890 [ 71.637915] Write of size 8 at addr ffff8881178c5958 by task swapper/1/0 [ 71.637915] [ 71.637915] CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc2-00318-g739a6c93cc75-dirty #12 PREEMPT(voluntary) [ 71.637915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 71.637915] Call Trace: [ 71.637915] [ 71.637915] dump_stack_lvl+0x53/0x70 [ 71.637915] print_report+0xce/0x670 [ 71.637915] ? _",
    "evidence": "osv:CVE-2025-38378",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.15.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-38378",
      "aliases": [
        "CVE-2025-38378"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "93a0fc48948107e0cc34e1de22c3cb363a8f2783"
                },
                {
                  "fixed": "51720dee3a61ebace36c3dcdd0b4a488e0970f29"
                },
                {
                  "fixed": "38224c472a038fa9ccd4085511dd9f3d6119dbf9"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38378.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.15.0"
                },
                {
                  "fixed": "6.15.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38378.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.793840312Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/38224c472a038fa9ccd4085511dd9f3d6119dbf9",
        "https://git.kernel.org/stable/c/51720dee3a61ebace36c3dcdd0b4a488e0970f29",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38378.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38378",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38378.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38378",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 489864,
  "published_at": "2025-07-25T12:53:20.144+00:00"
}