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UBUNTU-CVE-2021-3772 Moderate

UBUNTU-CVE-2021-3772

A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses.

Exploit probability Not scored
Published September 9, 2021
Required by Not available
Last source change August 18, 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-aws-5.11

11 explicit affected versions

Ubuntu:20.04:LTS linux-raspi2

6 explicit affected versions

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

20 explicit affected versions

Ubuntu:Pro:14.04:LTS linux

191 explicit affected versions

Ubuntu:18.04:LTS linux-aws

83 explicit affected versions

Ubuntu:20.04:LTS linux-kvm

46 explicit affected versions

Ubuntu:18.04:LTS linux-oracle

63 explicit affected versions

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

36 explicit affected versions

Ubuntu:20.04:LTS linux-oem-5.14

3 explicit affected versions

Ubuntu:18.04:LTS linux

95 explicit affected versions

Ubuntu:20.04:LTS linux-aws-5.13

2 explicit affected versions

Ubuntu:20.04:LTS linux-aws-5.8

4 explicit affected versions

Ubuntu:16.04:LTS linux-hwe-edge

23 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-kvm

83 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:20.04:LTS linux-hwe-5.8

21 explicit affected versions

Ubuntu:20.04:LTS linux-hwe-5.13

5 explicit affected versions

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

5 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:20.04:LTS linux-gcp-5.11

11 explicit affected versions

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

1 explicit affected versions

Ubuntu:20.04:LTS linux-intel-5.13

7 explicit affected versions

Ubuntu:20.04:LTS linux-oem-5.13

11 explicit affected versions

Ubuntu:20.04:LTS linux-gcp

50 explicit affected versions

Ubuntu:18.04:LTS linux-ibm-5.4

11 explicit affected versions

Ubuntu:20.04:LTS linux

58 explicit affected versions

Ubuntu:20.04:LTS linux-oracle-5.11

11 explicit affected versions

Ubuntu:20.04:LTS linux-azure

49 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-4.15

38 explicit affected versions

Ubuntu:18.04:LTS linux-hwe-edge

10 explicit affected versions

Ubuntu:Pro:16.04:LTS linux

149 explicit affected versions

Ubuntu:18.04:LTS linux-gke-5.4

33 explicit affected versions

Ubuntu:Pro:14.04:LTS linux-aws

82 explicit affected versions

Ubuntu:18.04:LTS linux-snapdragon

61 explicit affected versions

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

1 explicit affected versions

Ubuntu:20.04:LTS linux-iot

1 explicit affected versions

Ubuntu:20.04:LTS linux-oem-5.10

26 explicit affected versions

Ubuntu:20.04:LTS linux-gcp-5.13

2 explicit affected versions

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

1 explicit affected versions

Ubuntu:20.04:LTS linux-oem-5.6

29 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-5.3

13 explicit affected versions

Ubuntu:18.04:LTS linux-kvm

77 explicit affected versions

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

1 explicit affected versions

Ubuntu:20.04:LTS linux-aws

51 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

62 explicit affected versions

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

11 explicit affected versions

Ubuntu:20.04:LTS linux-hwe-5.11

12 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-gcp

85 explicit affected versions

Ubuntu:20.04:LTS linux-azure-5.8

7 explicit affected versions

Ubuntu:20.04:LTS linux-oracle

49 explicit affected versions

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

2 explicit affected versions

Ubuntu:18.04:LTS linux-raspi2

81 explicit affected versions

Ubuntu:18.04:LTS linux-hwe-5.4

46 explicit affected versions

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

1 explicit affected versions

Ubuntu:20.04:LTS linux-ibm

17 explicit affected versions

Ubuntu:20.04:LTS linux-gke

28 explicit affected versions

Ubuntu:18.04:LTS linux-azure-4.15

39 explicit affected versions

Ubuntu:20.04:LTS linux-azure-5.13

2 explicit affected versions

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

1 explicit affected versions

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

1 explicit affected versions

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

43 explicit affected versions

Ubuntu:20.04:LTS linux-oracle-5.8

5 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-5.4

40 explicit affected versions

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

1 explicit affected versions

Ubuntu:18.04:LTS linux-aws-5.4

38 explicit affected versions

Ubuntu:20.04:LTS linux-azure-5.11

12 explicit affected versions

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

6 explicit affected versions

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

39 explicit affected versions

Ubuntu:20.04:LTS linux-riscv-5.8

10 explicit affected versions

Ubuntu:20.04:LTS linux-oracle-5.13

2 explicit affected versions

Ubuntu:18.04:LTS linux-raspi-5.4

36 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:20.04:LTS linux-riscv-5.11

13 explicit affected versions

Ubuntu:18.04:LTS linux-gkeop-5.4

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

126 explicit affected versions

Ubuntu:18.04:LTS linux-oracle-5.4

39 explicit affected versions

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

61 explicit affected versions

Ubuntu:20.04:LTS linux-bluefield

17 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-azure

93 explicit affected versions

Ubuntu:Pro:14.04:LTS linux-azure

70 explicit affected versions

Ubuntu:20.04:LTS linux-gcp-5.8

4 explicit affected versions

Ubuntu:18.04:LTS linux-dell300x

26 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-oracle

61 explicit affected versions

Ubuntu:18.04:LTS linux-azure-5.4

39 explicit affected versions

Ubuntu:18.04:LTS linux-hwe

43 explicit affected versions

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

6 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-aws

105 explicit affected versions

Ubuntu:Pro:16.04:LTS linux-hwe

110 explicit affected versions

Ubuntu:18.04:LTS linux-gcp-edge

12 explicit affected versions

Ubuntu:20.04:LTS linux-raspi

40 explicit affected versions

Ubuntu:18.04:LTS linux-azure-edge

4 explicit affected versions

Ubuntu:20.04:LTS linux-gkeop

28 explicit affected versions

Ubuntu:22.04:LTS linux-realtime

1 explicit affected versions

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

17 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

04 / EVIDENCE

Source records

Open Source Vulnerabilities UBUNTU-CVE-2021-3772

A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses.

View original source

05 / REFERENCES

Further evidence