UBUNTU-CVE-2021-47260: Medium severity ubuntu/linux-azure vulnerability

Q: Who can exploit this issue?

The supplied severity vector indicates that exploitation requires local access and low privileges. No user interaction is required.

Q: What is the impact of successful exploitation?

The issue can cause a kernel Oops through a NULL dereference in nfs_get_client(), resulting in a high availability impact. The provided vector indicates no confidentiality or integrity impact.

Q: Are Ubuntu systems likely to be affected in normal use?

The vulnerability description states that the affected code path is expected to be dead code and that hopefully no one is affected. It does not identify a specific configuration or workload that triggers it.

Q: Which Ubuntu kernel packages are listed as affected?

The listed software includes ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, and their listed FIPS variants: ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

Published May 21, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix a potential NULL dereference in nfsgetclient() None of the callers are expecting NULL returns from nfsgetclient() so this code will lead to an Oops. It's better to return an error pointer. I expect that this is dead code so hopefully no one is affected.

Affected Software

117 affected componentsFixes available

ubuntu/linux-azure<4.15.0-1123.136~14.04.1

4.15.0-1123.136~14.04.1

ubuntu/linux-aws<4.4.0-1145.151

4.4.0-1145.151

ubuntu/linux-lts-xenial<4.4.0-270.304~14.04.1

4.4.0-270.304~14.04.1

ubuntu/linux<4.4.0-270.304

4.4.0-270.304

ubuntu/linux-aws<4.4.0-1183.198

4.4.0-1183.198

ubuntu/linux-aws-hwe<4.15.0-1111.118~16.04.1

4.15.0-1111.118~16.04.1

ubuntu/linux-azure<4.15.0-1123.136~16.04.1

4.15.0-1123.136~16.04.1

ubuntu/linux-gcp<4.15.0-1108.122~16.04.1

4.15.0-1108.122~16.04.1

ubuntu/linux-hwe<4.15.0-156.163~16.04.1

4.15.0-156.163~16.04.1

ubuntu/linux-kvm<4.4.0-1146.157

4.4.0-1146.157

ubuntu/linux-oracle<4.15.0-1080.88~16.04.1

4.15.0-1080.88~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-fips<4.4.0-1115.122

4.4.0-1115.122

ubuntu/linux-fips*

ubuntu/linux<4.15.0-156.163

4.15.0-156.163

ubuntu/linux-aws<4.15.0-1111.118

4.15.0-1111.118

ubuntu/linux-aws-5.4<5.4.0-1055.58~18.04.1

5.4.0-1055.58~18.04.1

ubuntu/linux-azure-4.15<4.15.0-1123.136

4.15.0-1123.136

ubuntu/linux-azure-5.4<5.4.0-1056.58~18.04.1

5.4.0-1056.58~18.04.1

ubuntu/linux-gcp-4.15<4.15.0-1108.122

4.15.0-1108.122

ubuntu/linux-gcp-5.4<5.4.0-1051.55~18.04.1

5.4.0-1051.55~18.04.1

ubuntu/linux-hwe-5.4<5.4.0-81.91~18.04.1

5.4.0-81.91~18.04.1

ubuntu/linux-kvm<4.15.0-1099.101

4.15.0-1099.101

ubuntu/linux-oracle<4.15.0-1080.88

4.15.0-1080.88

ubuntu/linux-oracle-5.4<5.4.0-1053.57~18.04.1

5.4.0-1053.57~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1042.46~18.04.3

5.4.0-1042.46~18.04.3

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-fips<4.15.0-2053.55

4.15.0-2053.55

ubuntu/linux-azure-fips<4.15.0-2035.39

4.15.0-2035.39

ubuntu/linux-fips<4.15.0-1069.78

4.15.0-1069.78

ubuntu/linux-gcp-fips<4.15.0-2018.20

4.15.0-2018.20

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.4.0-81.91

5.4.0-81.91

ubuntu/linux-aws<5.4.0-1055.58

5.4.0-1055.58

ubuntu/linux-azure<5.4.0-1056.58

5.4.0-1056.58

ubuntu/linux-bluefield<5.4.0-1019.22

5.4.0-1019.22

ubuntu/linux-gcp<5.4.0-1051.55

5.4.0-1051.55

ubuntu/linux-gkeop<5.4.0-1022.23

5.4.0-1022.23

ubuntu/linux-kvm<5.4.0-1045.47

5.4.0-1045.47

ubuntu/linux-oracle<5.4.0-1053.57

5.4.0-1053.57

ubuntu/linux-raspi<5.4.0-1042.46

5.4.0-1042.46

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux-aws-fips<5.4.0-1069.73+fips2

5.4.0-1069.73+fips2

ubuntu/linux-azure-fips<5.4.0-1073.76+fips1

5.4.0-1073.76+fips1

ubuntu/linux-fips<5.4.0-1032.37

5.4.0-1032.37

ubuntu/linux-gcp-fips<5.4.0-1067.71~20.04.1

5.4.0-1067.71~20.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-nvidia-6.2*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-raspi-realtime*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1123.136~14.04.1
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1145.151
Upgrade
Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.
Fixed in 4.4.0-270.304~14.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.4.0-270.304
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1183.198
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1111.118~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1123.136~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1108.122~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-156.163~16.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.4.0-1146.157
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1080.88~16.04.1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.4.0-1115.122
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-156.163
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1111.118
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1055.58~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1123.136
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1056.58~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1108.122
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1051.55~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-81.91~18.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1099.101
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1080.88
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1053.57~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1042.46~18.04.3
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2053.55
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2035.39
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1069.78
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2018.20
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-81.91
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1055.58
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1056.58
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1019.22
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1051.55
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1022.23
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1045.47
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1053.57
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1042.46
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.73+fips2
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1073.76+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1032.37
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1067.71~20.04.1

Event History

May 21, 2024

CVE Published

via OSV·03:15 PM

Data Sourced

via OSV·03:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Who can exploit this issue?

The supplied severity vector indicates that exploitation requires local access and low privileges. No user interaction is required.

What is the impact of successful exploitation?

The issue can cause a kernel Oops through a NULL dereference in nfs_get_client(), resulting in a high availability impact. The provided vector indicates no confidentiality or integrity impact.

Are Ubuntu systems likely to be affected in normal use?

The vulnerability description states that the affected code path is expected to be dead code and that hopefully no one is affected. It does not identify a specific configuration or workload that triggers it.

Which Ubuntu kernel packages are listed as affected?

The listed software includes ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, and their listed FIPS variants: ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

UBUNTU-CVE-2021-47260: Medium severity ubuntu/linux-azure vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

Who can exploit this issue?

What is the impact of successful exploitation?

Are Ubuntu systems likely to be affected in normal use?

Which Ubuntu kernel packages are listed as affected?

Company

Resources

Contact

Frequently Asked Questions

Who can exploit this issue?

What is the impact of successful exploitation?

Are Ubuntu systems likely to be affected in normal use?

Which Ubuntu kernel packages are listed as affected?