| Summary: |
VUL-0: CVE-2023-52491: kernel: media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_run |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Security Team bot <security-team> |
| Status: |
IN_PROGRESS
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Normal
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| Priority: |
P3 - Medium
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CC: |
ivan.ivanov, rfrohl, smash_bz
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| Version: |
unspecified | |
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| Target Milestone: |
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| Hardware: |
Other | |
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| OS: |
Other | |
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| URL: |
https://smash.suse.de/issue/397132/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2023-52491:6.2:(AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) |
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Found By:
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Security Response Team
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Services Priority:
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Business Priority:
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Blocker:
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Marketing QA Status:
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IT Deployment:
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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: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52491 https://git.kernel.org/stable/c/9fec4db7fff54d9b0306a332bab31eac47eeb5f6 https://www.cve.org/CVERecord?id=CVE-2023-52491 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