There is a use-after-free in kernel versions before 5.5 due to a race condition between the release of ptp_clock and cdev while resource deallocation. When a (high privileged) process allocates a ptp device file (like /dev/ptpX) and voluntarily goes to sleep. During this time if the underlying device is removed, it can cause an exploitable condition as the process wakes up to terminate and clean all attached files. The system crashes due to the cdev structure being invalid (as already freed) which is pointed to by the inode.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | Upgrade kernelUpgrade kernel-rt | Jun 5, 2020 | May 8, 2020 |
| Debian | — | Upgrade linux | Jun 11, 2020 | May 8, 2020 |
| Huawei Euleros 2_0_sp5 | — | Upgrade perfUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-headersUpgrade kernel-develUpgrade kernel-tools-libsUpgrade kernel | Mar 24, 2021 | May 8, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade python-perfUpgrade perfUpgrade kernel-sourceUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-develUpgrade kernelUpgrade kernel-headers | Dec 15, 2020 | May 8, 2020 |
| Oracle_linux | — | Upgrade kernelUpgrade kernel-uek | Jul 22, 2020 | Nov 25, 2019 |
| Redhat Openshift | — | Upgrade redhat-coreos | Dec 29, 2020 | May 8, 2020 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Jun 5, 2020 | May 8, 2020 |
| Suse | — | Upgrade kernel-default-extraUpgrade kernel-docsUpgrade kernel-obs-buildUpgrade kernel-default | May 15, 2020 | May 8, 2020 |
| Ubuntu | — | Upgrade linux-image-4.4.0-185-powerpc64-smpUpgrade linux-image-snapdragonUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-generic-lpaeUpgrade linux-image-generic-lpae-lts-xenialUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-powerpc64-smp-lts-xenialUpgrade linux-image-powerpc-e500mc-lts-xenialUpgrade linux-image-generic-lts-xenialUpgrade linux-image-powerpc-e500mcUpgrade linux-image-4.4.0-1074-awsUpgrade linux-image-powerpc64-smpUpgrade linux-image-4.4.0-185-genericUpgrade linux-image-kvmUpgrade linux-image-4.4.0-1076-kvmUpgrade linux-image-awsUpgrade linux-image-powerpc-smp-lts-xenialUpgrade linux-image-powerpc-smpUpgrade linux-image-powerpc64-emb-lts-xenialUpgrade linux-image-raspi2Upgrade linux-image-genericUpgrade linux-image-powerpc64-embUpgrade linux-image-4.4.0-1135-raspi2Upgrade linux-image-4.4.0-185-generic-lpaeUpgrade linux-image-lowlatencyUpgrade linux-image-4.4.0-185-powerpc64-embUpgrade linux-image-4.4.0-185-powerpc-e500mcUpgrade linux-image-4.4.0-185-powerpc-smpUpgrade linux-image-virtualUpgrade linux-image-4.4.0-185-lowlatencyUpgrade linux-image-4.4.0-1110-awsUpgrade linux-image-4.4.0-1139-snapdragon | Aug 5, 2020 | May 8, 2020 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 8, 2020 |
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