In the Linux kernel, the following vulnerability has been resolved:
binder: fix race between mmput() and do_exit()
Task A calls binder_update_page_range() to allocate and insert pages on a remote address space from Task B. For this, Task A pins the remote mm via mmget_not_zero() first. This can race with Task B do_exit() and the final mmput() refcount decrement will come from Task A.
Task A | Task B ------------------+------------------ mmget_not_zero() | | do_exit() | exit_mm() | mmput() mmput() | exit_mmap() | remove_vma() | fput() |
In this case, the work of ____fput() from Task B is queued up in Task A as TWA_RESUME. So in theory, Task A returns to userspace and the cleanup work gets executed. However, Task A instead sleep, waiting for a reply from Task B that never comes (it's dead).
This means the binder_deferred_release() is blocked until an unrelated binder event forces Task A to go back to userspace. All the associated death notifications will also be delayed until then.
In order to fix this use mmput_async() that will schedule the work in the corresponding mm->async_put_work WQ instead of Task A.
CVSS Details
- CVSS 3.1 Base Score: 4.7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jun 27, 2024 | Mar 18, 2024 |
| Ubuntu | — | Upgrade linux-image-virtualUpgrade linux-image-5.15.0-102-generic-64kUpgrade linux-image-6.5.0-1022-azure-fdeUpgrade linux-image-generic-lpaeUpgrade linux-image-intelUpgrade linux-image-5.15.0-1055-oracleUpgrade linux-image-5.4.0-176-genericUpgrade linux-image-5.4.0-1089-gkeopUpgrade linux-image-genericUpgrade linux-image-6.5.0-41-generic-64kUpgrade linux-image-5.4.0-1121-oracleUpgrade linux-image-5.15.0-1048-nvidia-lowlatencyUpgrade linux-image-6.5.0-41-lowlatency-64kUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-1050-ibmUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-raspi2Upgrade linux-image-5.15.0-1060-azureUpgrade linux-image-lowlatencyUpgrade linux-image-azure-cvmUpgrade linux-image-gkeopUpgrade linux-image-6.5.0-1017-laptopUpgrade linux-image-5.15.0-1052-intel-iotgUpgrade linux-image-gke-5.15Upgrade linux-image-oem-22.04bUpgrade linux-image-5.4.0-1082-bluefieldUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-generic-hwe-18.04Upgrade linux-image-5.4.0-1122-awsUpgrade linux-image-kvmUpgrade linux-image-gcpUpgrade linux-image-6.5.0-1021-nvidia-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-5.4.0-1110-kvmUpgrade linux-image-aws-lts-22.04Upgrade linux-image-oem-osp1Upgrade linux-image-azure-lts-20.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-5.4.0-176-lowlatencyUpgrade linux-image-5.15.0-1054-gkeUpgrade linux-image-6.5.0-1022-azureUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-oem-20.04dUpgrade linux-image-5.15.0-102-lowlatency-64kUpgrade linux-image-oem-20.04Upgrade linux-image-5.4.0-1069-ibmUpgrade linux-image-5.15.0-102-genericUpgrade linux-image-oracleUpgrade linux-image-5.4.0-1034-iotUpgrade linux-image-ibmUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-nvidia-64k-6.5Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-gcp-lts-20.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-intel-iotgUpgrade linux-image-raspi-hwe-18.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-6.5.0-1018-raspiUpgrade linux-image-bluefieldUpgrade linux-image-gkeUpgrade linux-image-5.4.0-1126-gcpUpgrade linux-image-5.15.0-1055-gcpUpgrade linux-image-6.5.0-1015-starfiveUpgrade linux-image-5.15.0-1054-kvmUpgrade linux-image-5.15.0-102-lowlatencyUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-6.5.0-1021-nvidiaUpgrade linux-image-starfiveUpgrade linux-image-oem-22.04cUpgrade linux-image-5.4.0-175-genericUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-raspi-nolpaeUpgrade linux-image-nvidiaUpgrade linux-image-oemUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-5.4.0-175-lowlatencyUpgrade linux-image-generic-64kUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-20.04bUpgrade linux-image-6.5.0-1022-gcpUpgrade linux-image-laptop-23.10Upgrade linux-image-5.4.0-1041-xilinx-zynqmpUpgrade linux-image-6.5.0-1021-awsUpgrade linux-image-5.4.0-1106-raspiUpgrade linux-image-gkeop-5.4Upgrade linux-image-5.15.0-1040-gkeopUpgrade linux-image-awsUpgrade linux-image-lowlatency-64kUpgrade linux-image-gkeop-5.15Upgrade linux-image-azureUpgrade linux-image-5.15.0-102-generic-lpaeUpgrade linux-image-oem-22.04Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-5.15.0-1048-nvidiaUpgrade linux-image-azure-fdeUpgrade linux-image-6.5.0-1024-oemUpgrade linux-image-aws-lts-20.04Upgrade linux-image-5.4.0-176-generic-lpaeUpgrade linux-image-5.4.0-1127-azureUpgrade linux-image-5.15.0-1057-awsUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-6.5.0-1024-oracle-64kUpgrade linux-image-6.5.0-1024-oracleUpgrade linux-image-5.15.0-1050-raspiUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-6.5.0-41-lowlatencyUpgrade linux-image-raspiUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-oem-22.04dUpgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-6.5Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-5.15.0-1060-azure-fdeUpgrade linux-image-6.5.0-41-generic | Apr 10, 2024 | Mar 18, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 18, 2024 |
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