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UBUNTU-CVE-2021-23134 High

UBUNTU-CVE-2021-23134

Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability.

Exploit probability Not scored
Published May 12, 2021
Required by Not available
Last source change May 20, 2026

02 / AFFECTED SOFTWARE

Affected packages

Ubuntu:18.04:LTS linux-oem

50 explicit affected versions

Ubuntu:18.04:LTS linux-aws-5.0

6 explicit affected versions

Ubuntu:20.04:LTS linux-raspi2

6 explicit affected versions

Ubuntu:Pro:FIPS-updates:20.04:LTS linux-fips

1 explicit affected versions

Ubuntu:18.04:LTS linux-aws

67 explicit affected versions

Ubuntu:20.04:LTS linux-kvm

27 explicit affected versions

Ubuntu:18.04:LTS linux-oracle

47 explicit affected versions

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

20 explicit affected versions

Ubuntu:18.04:LTS linux

77 explicit affected versions

Ubuntu:20.04:LTS linux-aws-5.8

2 explicit affected versions

Ubuntu:16.04:LTS linux-hwe-edge

23 explicit affected versions

Ubuntu:24.04:LTS linux-raspi-realtime

1 explicit affected versions

Ubuntu:20.04:LTS linux-hwe-5.8

20 explicit affected versions

Ubuntu:18.04:LTS linux-oracle-5.0

7 explicit affected versions

Ubuntu:20.04:LTS linux-riscv

12 explicit affected versions

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

1 explicit affected versions

Ubuntu:20.04:LTS linux-gcp

29 explicit affected versions

Ubuntu:20.04:LTS linux

37 explicit affected versions

Ubuntu:20.04:LTS linux-azure

29 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-4.15

22 explicit affected versions

Ubuntu:18.04:LTS linux-gke-5.4

14 explicit affected versions

Ubuntu:18.04:LTS linux-snapdragon

44 explicit affected versions

Ubuntu:20.04:LTS linux-oem-5.10

13 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-5.3

13 explicit affected versions

Ubuntu:18.04:LTS linux-kvm

61 explicit affected versions

Ubuntu:20.04:LTS linux-aws

32 explicit affected versions

Ubuntu:18.04:LTS linux-gke-4.15

33 explicit affected versions

Ubuntu:18.04:LTS linux-aws-5.3

10 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-aws-hwe

46 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-gcp

69 explicit affected versions

Ubuntu:20.04:LTS linux-azure-5.8

2 explicit affected versions

Ubuntu:20.04:LTS linux-oracle

29 explicit affected versions

Ubuntu:18.04:LTS linux-raspi2

64 explicit affected versions

Ubuntu:18.04:LTS linux-hwe-5.4

25 explicit affected versions

Ubuntu:20.04:LTS linux-gke

9 explicit affected versions

Ubuntu:18.04:LTS linux-azure-4.15

23 explicit affected versions

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

26 explicit affected versions

Ubuntu:20.04:LTS linux-oracle-5.8

3 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-5.4

19 explicit affected versions

Ubuntu:18.04:LTS linux-aws-5.4

20 explicit affected versions

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

23 explicit affected versions

Ubuntu:20.04:LTS linux-riscv-5.8

10 explicit affected versions

Ubuntu:18.04:LTS linux-raspi-5.4

18 explicit affected versions

Ubuntu:18.04:LTS linux-azure

44 explicit affected versions

Ubuntu:18.04:LTS linux-azure-5.3

16 explicit affected versions

Ubuntu:18.04:LTS linux-gkeop-5.4

14 explicit affected versions

Ubuntu:18.04:LTS linux-gcp

38 explicit affected versions

Ubuntu:18.04:LTS linux-oracle-5.3

9 explicit affected versions

Ubuntu:18.04:LTS linux-oracle-5.4

19 explicit affected versions

Ubuntu:20.04:LTS linux-bluefield

3 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-azure

77 explicit affected versions

Ubuntu:Pro:14.04:LTS linux-azure

54 explicit affected versions

Ubuntu:20.04:LTS linux-gcp-5.8

2 explicit affected versions

Ubuntu:18.04:LTS linux-dell300x

13 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-oracle

45 explicit affected versions

Ubuntu:18.04:LTS linux-azure-5.4

19 explicit affected versions

Ubuntu:18.04:LTS linux-hwe

43 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-hwe

92 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-edge

12 explicit affected versions

Ubuntu:20.04:LTS linux-raspi

22 explicit affected versions

Ubuntu:18.04:LTS linux-azure-edge

4 explicit affected versions

Ubuntu:20.04:LTS linux-gkeop

9 explicit affected versions

Ubuntu:22.04:LTS linux-realtime

1 explicit affected versions

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

1 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

related USN-4997-1
related USN-4997-2

04 / EVIDENCE

Source records

Open Source Vulnerabilities UBUNTU-CVE-2021-23134

Use After Free vulnerability in nfc sockets in the Linux Kernel before 5.12.4 allows local attackers to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP_NET_RAW capability.

View original source

05 / REFERENCES

Further evidence