CVE-2023-52491 (GCVE-0-2023-52491)
Vulnerability from cvelistv5
Published
2024-02-29 15:52
Modified
2025-05-04 07:37
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: b2f0d2724ba477d326e9d654d4db1c93e98f8b93
Version: b2f0d2724ba477d326e9d654d4db1c93e98f8b93
Version: b2f0d2724ba477d326e9d654d4db1c93e98f8b93
Version: b2f0d2724ba477d326e9d654d4db1c93e98f8b93
Version: b2f0d2724ba477d326e9d654d4db1c93e98f8b93
Version: b2f0d2724ba477d326e9d654d4db1c93e98f8b93
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