Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_sync() in switch_drv_remove(). Although we use flush_work() to stop the worker, it could be rescheduled in switch_timer(). As a result, a use-after-free bug can occur. The details are shown below: (cpu 0) | (cpu 1) switch_drv_remove() | flush_work() | ... | switch_timer // timer | schedule_work(&psw->work) timer_shutdown_sync() | ... | switch_work_handler // worker kfree(psw) // free | | psw->state = 0 // use This patch puts timer_shutdown_sync() before flush_work() to mitigate the bugs. As a result, the worker and timer will be stopped safely before the deallocate operations.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.20, < 6.5.4 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65Patch
- https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4dePatch
- https://git.kernel.org/stable/c/246f80a0b17f8f582b2c0996db02998239057c65Patch
- https://git.kernel.org/stable/c/610dbd8ac271aa36080aac50b928d700ee3fe4dePatch
FAQ
What is CVE-2023-52629?
CVE-2023-52629 is a vulnerability with a CVSS score of 8.4 (HIGH). In the Linux kernel, the following vulnerability has been resolved: sh: push-switch: Reorder cleanup operations to avoid use-after-free bug The original code puts flush_work() before timer_shutdown_...
How severe is CVE-2023-52629?
CVE-2023-52629 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-52629?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.