CVE-2023-52491: media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run
First published: Thu Feb 29 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.12<5.10.210 | |
| Linux Kernel | >=5.11<5.15.149 | |
| Linux Kernel | >=5.16<6.1.76 | |
| Linux Kernel | >=6.2<6.6.15 | |
| Linux Kernel | >=6.7<6.7.3 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.11-1 6.12.12-1 |
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Reference Links
- https://git.kernel.org/stable/c/1b1036c60a37a30caf6759a90fe5ecd06ec35590
- https://git.kernel.org/stable/c/206c857dd17d4d026de85866f1b5f0969f2a109e
- https://git.kernel.org/stable/c/43872f44eee6c6781fea1348b38885d8e78face9
- https://git.kernel.org/stable/c/6e2f37022f0fc0893da4d85a0500c9d547fffd4c
- https://git.kernel.org/stable/c/8254d54d00eb6cdb8367399c7f912eb8d354ecd7
- https://git.kernel.org/stable/c/9fec4db7fff54d9b0306a332bab31eac47eeb5f6
- https://launchpad.net/bugs/cve/CVE-2023-52491
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52491
- https://nvd.nist.gov/vuln/detail/CVE-2023-52491
- https://security-tracker.debian.org/tracker/CVE-2023-52491
- https://ubuntu.com/security/CVE-2023-52491
- https://git.kernel.org/linus/206c857dd17d4d026de85866f1b5f0969f2a109e
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