Description
In the Linux kernel, the following vulnerability has been resolved: phy: tegra: xusb: Fix unbalanced regulator disable in UTMI PHY mode When transitioning from USB_ROLE_DEVICE to USB_ROLE_NONE, the code assumed that the regulator should be disabled. However, if the regulator is marked as always-on, regulator_is_enabled() continues to return true, leading to an incorrect attempt to disable a regulator which is not enabled. This can result in warnings such as: [ 250.155624] WARNING: CPU: 1 PID: 7326 at drivers/regulator/core.c:3004 _regulator_disable+0xe4/0x1a0 [ 250.155652] unbalanced disables for VIN_SYS_5V0 To fix this, we move the regulator control logic into tegra186_xusb_padctl_id_override() function since it's directly related to the ID override state. The regulator is now only disabled when the role transitions from USB_ROLE_HOST to USB_ROLE_NONE, by checking the VBUS_ID register. This ensures that regulator enable/disable operations are properly balanced and only occur when actually transitioning to/from host mode.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < ceb645ac6ce052609ee5c8f819a80e8881789b04affected49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < cdcb0ffd6448f6be898956913a42bd08e59fb2aeaffected49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < 1bb85b5c2bd43b687c3d54eb6328917f90dd38fcaffected49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < 5367cdeb75cb6c687ca468450bceb2602ab239d8affected49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < ec7f98ff05f0649af0adeb4808c7ba23d6111ef9affected49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < eaa420339658615d26c1cc95cd6cf720b9aebfcaaffected49d46e3c7e597e8b00c6fc16e6fd7a92044f4371 to < cefc1caee9dd06c69e2d807edc5949b329f52b22affected
Linux Linux
Default version status: affected
5.7affected0 to < 5.7unaffected5.10.241 to ≤ 5.10.*unaffected5.15.190 to ≤ 5.15.*unaffected6.1.147 to ≤ 6.1.*unaffected6.6.100 to ≤ 6.6.*unaffected6.12.40 to ≤ 6.12.*unaffected6.15.8 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ceb645ac6ce052609ee5c8f819a80e8881789b04 ↗
- https://git.kernel.org/stable/c/cdcb0ffd6448f6be898956913a42bd08e59fb2ae ↗
- https://git.kernel.org/stable/c/1bb85b5c2bd43b687c3d54eb6328917f90dd38fc ↗
- https://git.kernel.org/stable/c/5367cdeb75cb6c687ca468450bceb2602ab239d8 ↗
- https://git.kernel.org/stable/c/ec7f98ff05f0649af0adeb4808c7ba23d6111ef9 ↗
- https://git.kernel.org/stable/c/eaa420339658615d26c1cc95cd6cf720b9aebfca ↗
- https://git.kernel.org/stable/c/cefc1caee9dd06c69e2d807edc5949b329f52b22 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗