media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run

{
  "id": "fabd4c13d598c864542b605bfc93bd0bd62d8724cc8c4a4f0a48cb754681f93b",
  "url": "https://osv.dev/vulnerability/CVE-2023-52491",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run In mtk_jpeg_probe, &jpeg->job_timeout_work is bound with mtk_jpeg_job_timeout_work. In mtk_jpeg_dec_device_run, if error happens in mtk_jpeg_set_dec_dst, it will finally start the worker while mark the job as finished by invoking v4l2_m2m_job_finish. There are two methods to trigger the bug. If we remove the module, it which will call mtk_jpeg_remove to make cleanup. The possible sequence is as follows, which will cause a use-after-free bug. CPU0 CPU1 mtk_jpeg_dec_... | start worker | |mtk_jpeg_job_timeout_work mtk_jpeg_remove | v4l2_m2m_release | kfree(m2m_dev); | | | v4l2_m2m_get_curr_priv | m2m_dev->curr_ctx //use If we close the file descriptor, which will call mtk_jpeg_release, it will have a similar sequence. Fix this bug by starting timeout worker only if started jpegdec worker successfully. Then v4l2_m2m_job_finish will only be called in either mtk_jpeg_job_timeout_work or mtk_jpeg_dec_device_run.",
    "evidence": "osv:CVE-2023-52491",
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      "modified": "2026-10-28T02:30:39.425567488Z",
      "provider": "osv",
      "references": [
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        "https://git.kernel.org/stable/c/206c857dd17d4d026de85866f1b5f0969f2a109e",
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        "https://git.kernel.org/stable/c/9fec4db7fff54d9b0306a332bab31eac47eeb5f6",
        "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52491.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-52491",
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  "source_id": "core-osv",
  "document_id": 506454,
  "published_at": "2024-02-29T15:52:09.891+00:00"
}