CVSS 5.5 · Medium EPSS 0,21%
Kerentanan Missing Release of Memory after Effective Lifetime pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: usb: dwc2: fix a devres leak in hw_enable upon suspend resume Each time the platform goes to low power, PM suspend / resume routines call: __dwc2_lowlevel_hw_enable -> devm_add_action_or_reset(). This adds a new devres each time. This may also happen at runtime, as dwc2_lowlevel_hw_enable() can be called from udc_start(). This can be seen with tracing: - echo 1 > /sys/kernel/debug/tracing/events/dev/devres_log/enable - go to low power - cat /sys/kernel/debug/tracing/trace A new "ADD" entry is found upon each low power cycle: ... devres_log: 49000000.usb-otg ADD 82a13bba devm_action_release (8 bytes) ... devres_log: 49000000.usb-otg ADD 49889daf devm_action_release (8 bytes) ... A second issue is addressed here: - regulator_bulk_enable() is called upon each PM cycle (suspend/resume). - regulator_bulk_disable() never gets called. So the reference count for these regulators constantly increase, by one upon each low power cycle, due to missing regulator_bulk_disable() call in __dwc2_lowlevel_hw_disable(). The original fix that introduced the devm_add_action_or_reset() call, fixed an issue during probe, that happens due to other errors in dwc2_driver_probe() -> dwc2_core_reset(). Then the probe fails without disabling regulators, when dr_mode == USB_DR_MODE_PERIPHERAL. Rather fix the error path: disable all the low level hardware in the error path, by using the "hsotg->ll_hw_enabled" flag. Checking dr_mode has been introduced to avoid a dual call to dwc2_lowlevel_hw_disable(). "ll_hw_enabled" should achieve the same (and is used currently in the remove() routine).
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 4.4.233 hingga sebelum 4.5 |
| linux | linux kernel | Versi 4.9.233 hingga sebelum 4.10 |
| linux | linux kernel | Versi 4.14.194 hingga sebelum 4.15 |
| linux | linux kernel | Versi 4.19.140 hingga sebelum 4.20 |
| linux | linux kernel | Versi 5.4.59 hingga sebelum 5.5 |
| linux | linux kernel | Versi 5.7.16 hingga sebelum 5.8 |
| linux | linux kernel | Versi 5.8.2 hingga sebelum 5.10.177 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.105 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.22 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.2.9 |
| linux | linux kernel | Versi 6.3 rc1 |
| linux | linux kernel | Versi 6.3 rc2 |
| linux | linux kernel | Versi 6.3 rc3 |