In the Linux kernel, the following vulnerability has been resolved:
regulator: core: fix use_count leakage when handling boot-on
I found a use_count leakage towards supply regulator of rdev with boot-on option.
┌───────────────────┐ ┌───────────────────┐ │ regulator_dev A │ │ regulator_dev B │ │ (boot-on) │ │ (boot-on) │ │ use_count=0 │◀──supply──│ use_count=1 │ │ │ │ │ └───────────────────┘ └───────────────────┘
In case of rdev(A) configured with `regulator-boot-on', the use_count of supplying regulator(B) will increment inside regulator_enable(rdev->supply).
Thus, B will acts like always-on, and further balanced regulator_enable/disable cannot actually disable it anymore.
However, B was also configured with `regulator-boot-on', we wish it could be disabled afterwards.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade kernel-toolsUpgrade python-perfUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernelUpgrade perfUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade kernel-livepatch-5.10.165-143.735Upgrade perf-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perf | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 15, 2025 |
| Ubuntu | — | Upgrade linux-nvidia-tegra-5.15Upgrade linux-raspiUpgrade linux-ibm-5.4Upgrade linux-gcp-fipsUpgrade linux-azureUpgrade linux-gkeopUpgrade linuxUpgrade linux-lowlatencyUpgrade linux-gcp-5.4Upgrade linux-aws-5.4Upgrade linux-awsUpgrade linux-hwe-5.15Upgrade linux-azure-5.4Upgrade linux-azure-fipsUpgrade linux-azure-fde-5.15Upgrade linux-iotUpgrade linux-oracle-5.15Upgrade linux-azure-5.15Upgrade linux-gcpUpgrade linux-nvidiaUpgrade linux-raspi-5.4Upgrade linux-intel-iot-realtimeUpgrade linux-aws-5.15Upgrade linux-oracleUpgrade linux-realtimeUpgrade linux-riscv-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-oracle-5.4Upgrade linux-fipsUpgrade linux-gkeUpgrade linux-xilinx-zynqmpUpgrade linux-ibmUpgrade linux-aws-fipsUpgrade linux-gcp-5.15Upgrade linux-hwe-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-kvmUpgrade linux-intel-iotgUpgrade linux-bluefield | Sep 19, 2025 | Sep 16, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 15, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub