CVE-2023-52491

2024-03-1100:00:00

ubuntu.com

linux kernel

vulnerability

mtk-jpeg

use-after-free

bug

error handling

v4l2_m2m_job_finish

worker

timeout

AI Score

7.7

Confidence

High

EPSS

Percentile

10.3%

JSON

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.

Notes

Author	Note
rodrigo-zaiden	USN-6765-1 for linux-oem-6.5 wrongly stated that this CVE was fixed in version 6.5.0-1022.23. The mentioned notice was revoked and the state of the fix for linux-oem-6.5 was recovered to the previous state.

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< anyUNKNOWN
ubuntu22.04noarchlinux< 5.15.0-106.116UNKNOWN
ubuntu23.10noarchlinux< 6.5.0-41.41UNKNOWN
ubuntu20.04noarchlinux-aws< anyUNKNOWN
ubuntu22.04noarchlinux-aws< 5.15.0-1061.67UNKNOWN
ubuntu23.10noarchlinux-aws< 6.5.0-1021.21UNKNOWN
ubuntu20.04noarchlinux-aws-5.15< 5.15.0-1061.67~20.04.1UNKNOWN
ubuntu22.04noarchlinux-aws-6.5< anyUNKNOWN
ubuntu20.04noarchlinux-azure< anyUNKNOWN
ubuntu22.04noarchlinux-azure< 5.15.0-1063.72UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< any	UNKNOWN
ubuntu	22.04	noarch	linux	< 5.15.0-106.116	UNKNOWN
ubuntu	23.10	noarch	linux	< 6.5.0-41.41	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	22.04	noarch	linux-aws	< 5.15.0-1061.67	UNKNOWN
ubuntu	23.10	noarch	linux-aws	< 6.5.0-1021.21	UNKNOWN
ubuntu	20.04	noarch	linux-aws-5.15	< 5.15.0-1061.67~20.04.1	UNKNOWN
ubuntu	22.04	noarch	linux-aws-6.5	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< any	UNKNOWN
ubuntu	22.04	noarch	linux-azure	< 5.15.0-1063.72	UNKNOWN