CVE-2022-49685: iio: trigger: sysfs: fix use-after-free on remove
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: iio: trigger: sysfs: fix use-after-free on remove Ensure that the irq_work has completed before the trigger is freed. ================================================================== BUG: KASAN: use-after-free in irq_work_run_list Read of size 8 at addr 0000000064702248 by task python3/25 Call Trace: irq_work_run_list irq_work_tick update_process_times tick_sched_handle tick_sched_timer __hrtimer_run_queues hrtimer_interrupt Allocated by task 25: kmem_cache_alloc_trace iio_sysfs_trig_add dev_attr_store sysfs_kf_write kernfs_fop_write_iter new_sync_write vfs_write ksys_write sys_write Freed by task 25: kfree iio_sysfs_trig_remove dev_attr_store sysfs_kf_write kernfs_fop_write_iter new_sync_write vfs_write ksys_write sys_write ==================================================================
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | >=3.7<4.9.321 | |
| Linux Kernel | >=4.10<4.14.286 | |
| Linux Kernel | >=4.15<4.19.250 | |
| Linux Kernel | >=4.20<5.4.202 | |
| Linux Kernel | >=5.5<5.10.127 | |
| Linux Kernel | >=5.11<5.15.51 | |
| Linux Kernel | >=5.16<5.18.8 | |
| Linux Kernel | =5.19-rc1 | |
| Linux Kernel | =5.19-rc2 | |
| Linux Kernel | =5.19-rc3 |
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Reference Links
- https://git.kernel.org/stable/c/d6111e7bdb8ec27eb43d01c4cd4ff1620a75f7f2
- https://git.kernel.org/stable/c/fd5d8fb298a2866c337da635c79d63c3afabcaf7
- https://git.kernel.org/stable/c/31ff3309b47d98313c61b8301bf595820cc3cc33
- https://git.kernel.org/stable/c/5e39397d60dacc7f5d81d442c1c958eaaaf31128
- https://git.kernel.org/stable/c/b07a30a774b3c3e584a68dc91779c68ea2da4813
- https://git.kernel.org/stable/c/4687c3f955240ca2a576bdc3f742d4d915b6272d
- https://git.kernel.org/stable/c/4ef1e521be610b720daeb7cf899fedc7db0274c4
- https://git.kernel.org/stable/c/78601726d4a59a291acc5a52da1d3a0a6831e4e8
Frequently Asked Questions
What is the severity of CVE-2022-49685?
CVE-2022-49685 has been classified with a high severity due to its potential for exploitation involving use-after-free conditions in the Linux kernel.
How do I fix CVE-2022-49685?
To mitigate CVE-2022-49685, ensure that your Linux kernel is updated to a patched version that addresses the use-after-free vulnerability.
What is the impact of CVE-2022-49685 on systems?
CVE-2022-49685 may allow an attacker to exploit a use-after-free vulnerability, potentially leading to denial of service or arbitrary code execution.
Which versions of Linux kernel are affected by CVE-2022-49685?
CVE-2022-49685 affects specific versions of the Linux kernel that are prior to application of the associated patches.
Who is responsible for addressing CVE-2022-49685 in their systems?
System administrators and users running affected versions of the Linux kernel should take action to update their software to mitigate CVE-2022-49685.
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