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 kernel-rtUpgrade kernel | Jun 5, 2020 | May 8, 2020 |
| Debian | — | Upgrade linux | Jun 11, 2020 | May 8, 2020 |
| Huawei Euleros 2_0_sp5 | — | Upgrade kernel-develUpgrade kernel-tools-libsUpgrade kernel-headersUpgrade kernelUpgrade python-perfUpgrade perfUpgrade kernel-tools | Mar 24, 2021 | May 8, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade perfUpgrade python3-perfUpgrade kernel-develUpgrade python-perfUpgrade kernel-sourceUpgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-headersUpgrade kernel | Dec 15, 2020 | May 8, 2020 |
| Oracle_linux | — | Upgrade kernel-uekUpgrade kernel | Jul 22, 2020 | Nov 25, 2019 |
| Redhat Openshift | — | Upgrade redhat-coreos | Dec 29, 2020 | May 8, 2020 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | Jun 5, 2020 | May 8, 2020 |
| Suse | — | Upgrade kernel-docsUpgrade kernel-defaultUpgrade kernel-obs-buildUpgrade kernel-default-extra | May 15, 2020 | May 8, 2020 |
| Ubuntu | — | Upgrade linux-image-genericUpgrade linux-image-powerpc-smp-lts-xenialUpgrade linux-image-4.4.0-1110-awsUpgrade linux-image-powerpc-smpUpgrade linux-image-4.4.0-1139-snapdragonUpgrade linux-image-powerpc64-embUpgrade linux-image-powerpc64-emb-lts-xenialUpgrade linux-image-lowlatencyUpgrade linux-image-raspi2Upgrade linux-image-4.4.0-185-powerpc-smpUpgrade linux-image-4.4.0-185-lowlatencyUpgrade linux-image-4.4.0-1135-raspi2Upgrade linux-image-4.4.0-185-powerpc-e500mcUpgrade linux-image-4.4.0-185-powerpc64-embUpgrade linux-image-virtualUpgrade linux-image-4.4.0-185-generic-lpaeUpgrade linux-image-powerpc-e500mc-lts-xenialUpgrade linux-image-kvmUpgrade linux-image-powerpc-e500mcUpgrade linux-image-powerpc64-smp-lts-xenialUpgrade linux-image-powerpc64-smpUpgrade linux-image-snapdragonUpgrade linux-image-4.4.0-1076-kvmUpgrade linux-image-4.4.0-1074-awsUpgrade linux-image-awsUpgrade linux-image-generic-lts-xenialUpgrade linux-image-4.4.0-185-powerpc64-smpUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-generic-lpaeUpgrade linux-image-generic-lpae-lts-xenialUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-4.4.0-185-generic | 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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