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UBUNTU-CVE-2020-10690 Moderate

UBUNTU-CVE-2020-10690

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.

Exploit probability Not scored
Published May 8, 2020
Required by Not available
Last source change August 18, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:16.04:LTS linux-snapdragon

80 explicit affected versions

Ubuntu:18.04:LTS linux-oem

33 explicit affected versions

Ubuntu:18.04:LTS linux-aws-5.0

6 explicit affected versions

Ubuntu:18.04:LTS linux-oem-osp1

13 explicit affected versions

Ubuntu:20.04:LTS linux-raspi2

6 explicit affected versions

Ubuntu:Pro:14.04:LTS linux

191 explicit affected versions

Ubuntu:18.04:LTS linux-aws

38 explicit affected versions

Ubuntu:18.04:LTS linux-oracle

19 explicit affected versions

Ubuntu:Pro:FIPS-updates:18.04:LTS linux-azure-fips

1 explicit affected versions

Ubuntu:18.04:LTS linux

44 explicit affected versions

Ubuntu:16.04:LTS linux-hwe-edge

23 explicit affected versions

Ubuntu:Pro:FIPS:18.04:LTS linux-gcp-fips

1 explicit affected versions

Ubuntu:24.04:LTS linux-raspi-realtime

1 explicit affected versions

Ubuntu:18.04:LTS linux-oracle-5.0

7 explicit affected versions

Ubuntu:22.04:LTS linux-intel-iot-realtime

1 explicit affected versions

Ubuntu:16.04:LTS linux-kvm

48 explicit affected versions

Ubuntu:18.04:LTS linux-gke-5.0

11 explicit affected versions

Ubuntu:18.04:LTS linux-hwe-edge

10 explicit affected versions

Ubuntu:16.04:LTS linux-oracle

19 explicit affected versions

Ubuntu:Pro:14.04:LTS linux-aws

47 explicit affected versions

Ubuntu:18.04:LTS linux-snapdragon

18 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-5.3

3 explicit affected versions

Ubuntu:18.04:LTS linux-gke-5.3

1 explicit affected versions

Ubuntu:18.04:LTS linux-kvm

36 explicit affected versions

Ubuntu:Pro:FIPS:18.04:LTS linux-azure-fips

1 explicit affected versions

Ubuntu:18.04:LTS linux-gke-4.15

15 explicit affected versions

Ubuntu:22.04:LTS linux-riscv

23 explicit affected versions

Ubuntu:Nvidia-BlueField:24.04:LTS linux-bluefield

11 explicit affected versions

Ubuntu:16.04:LTS linux-raspi2

82 explicit affected versions

Ubuntu:Pro:FIPS:16.04:LTS linux-fips

2 explicit affected versions

Ubuntu:18.04:LTS linux-raspi2

39 explicit affected versions

Ubuntu:16.04:LTS linux-gcp

43 explicit affected versions

Ubuntu:16.04:LTS linux

111 explicit affected versions

Ubuntu:20.04:LTS linux-gke

51 explicit affected versions

Ubuntu:16.04:LTS linux-azure

52 explicit affected versions

Ubuntu:Pro:FIPS:18.04:LTS linux-aws-fips

1 explicit affected versions

Ubuntu:Pro:FIPS-updates:18.04:LTS linux-aws-fips

1 explicit affected versions

Ubuntu:16.04:LTS linux-aws

69 explicit affected versions

Ubuntu:16.04:LTS linux-aws-hwe

21 explicit affected versions

Ubuntu:18.04:LTS linux-azure

44 explicit affected versions

Ubuntu:18.04:LTS linux-azure-5.3

5 explicit affected versions

Ubuntu:20.04:LTS linux-azure-fde

26 explicit affected versions

Ubuntu:18.04:LTS linux-raspi2-5.3

1 explicit affected versions

Ubuntu:18.04:LTS linux-gcp

38 explicit affected versions

Ubuntu:Pro:14.04:LTS linux-lts-xenial

89 explicit affected versions

Ubuntu:16.04:LTS linux-hwe

65 explicit affected versions

Ubuntu:Pro:FIPS:16.04:LTS linux-fips

24 explicit affected versions

Ubuntu:Pro:14.04:LTS linux-azure

29 explicit affected versions

Ubuntu:18.04:LTS linux-hwe

22 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-edge

12 explicit affected versions

Ubuntu:18.04:LTS linux-azure-edge

4 explicit affected versions

Ubuntu:22.04:LTS linux-realtime

1 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities UBUNTU-CVE-2020-10690

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.

View original source

05 / REFERENCES

Further evidence