media: mtk-jpeg: fix use-after-free in release path due to uncancelled work

{
  "id": "66f14f8ef6fe45f995624daeac1ea36c4e88e2b4bfc40ea20aa66e4042f7f1a2",
  "url": "https://osv.dev/vulnerability/CVE-2026-46011",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: mtk-jpeg: fix use-after-free in release path due to uncancelled work",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: mtk-jpeg: fix use-after-free in release path due to uncancelled work The mtk_jpeg_release() function frees the context structure (ctx) without first cancelling any pending or running work in ctx->jpeg_work. This creates a race window where the workqueue callback may still be accessing the context memory after it has been freed. Race condition: CPU 0 (release) CPU 1 (workqueue) ---------------- ------------------ close() mtk_jpeg_release() mtk_jpegenc_worker() ctx = work->data // accessing ctx kfree(ctx) // freed! access ctx // UAF! The work is queued via queue_work() during JPEG encode/decode operations (via mtk_jpeg_device_run). If the device is closed while work is pending or running, the work handler will access freed memory. Fix this by calling cancel_work_sync() BEFORE acquiring the mutex. This ordering is critical: if cancel_work_sync() is called after mutex_lock(), and the work handler also tries to acquire the same mutex, it would cause a deadlock. Note: The open error path does NOT need cancel_work_sync() because INIT_WORK() only initializes the work structure - it does not schedule it. Work is only scheduled later during ioctl operations.",
    "evidence": "osv:CVE-2026-46011",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "6.6.140",
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          {
            "value": "7.0.4",
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    "severity": "high",
    "structured": {
      "id": "CVE-2026-46011",
      "aliases": [
        "CVE-2026-46011"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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              "type": "ECOSYSTEM",
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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          "database_specific": {
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      ],
      "modified": "2026-10-28T02:30:31.276715375Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0498b27a1542021d90269d58347501d4c3ccd84e",
        "https://git.kernel.org/stable/c/2209fdae5c2f615930c9af1379c1cfca199ec5d8",
        "https://git.kernel.org/stable/c/26506a30e0e26d612f82a7bf0e395626968a44e6",
        "https://git.kernel.org/stable/c/34c519feef3e4fcff1078dc8bdb25fbbbd10303f",
        "https://git.kernel.org/stable/c/e78c39f720679fcf3a2eacd82725ec3ea2648301",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46011.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46011",
        "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/2026/46xxx/CVE-2026-46011.json"
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        "value": "CVE-2026-46011",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 497894,
  "published_at": "2026-05-27T12:56:13.198+00:00"
}