Advisory Published

USN-5240-1: Linux kernel vulnerability

First published: Wed Jan 19 2022(Updated: )

William Liu and Jamie Hill-Daniel discovered that the file system context functionality in the Linux kernel contained an integer underflow vulnerability, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-virtual<5.13.0.27.37
5.13.0.27.37
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-27-generic-lpae<5.13.0-27.29
5.13.0-27.29
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1015-raspi-nolpae<5.13.0-1015.17
5.13.0-1015.17
Ubuntu=21.10
All of
ubuntu/linux-image-generic-64k<5.13.0.27.37
5.13.0.27.37
Ubuntu=21.10
All of
ubuntu/linux-image-generic<5.13.0.27.37
5.13.0.27.37
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1012-azure<5.13.0-1012.14
5.13.0-1012.14
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-27-lowlatency<5.13.0-27.29
5.13.0-27.29
Ubuntu=21.10
All of
ubuntu/linux-image-aws<5.13.0.1011.12
5.13.0.1011.12
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1012-gcp<5.13.0-1012.15
5.13.0-1012.15
Ubuntu=21.10
All of
ubuntu/linux-image-azure<5.13.0.1012.12
5.13.0.1012.12
Ubuntu=21.10
All of
ubuntu/linux-image-raspi-nolpae<5.13.0.1015.20
5.13.0.1015.20
Ubuntu=21.10
All of
ubuntu/linux-image-oem-20.04<5.13.0.27.37
5.13.0.27.37
Ubuntu=21.10
All of
ubuntu/linux-image-gke<5.13.0.1012.11
5.13.0.1012.11
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-27-generic<5.13.0-27.29
5.13.0-27.29
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1010-kvm<5.13.0-1010.11
5.13.0-1010.11
Ubuntu=21.10
All of
ubuntu/linux-image-gcp<5.13.0.1012.11
5.13.0.1012.11
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1015-raspi<5.13.0-1015.17
5.13.0-1015.17
Ubuntu=21.10
All of
ubuntu/linux-image-oracle<5.13.0.1015.15
5.13.0.1015.15
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1015-oracle<5.13.0-1015.19
5.13.0-1015.19
Ubuntu=21.10
All of
ubuntu/linux-image-raspi<5.13.0.1015.20
5.13.0.1015.20
Ubuntu=21.10
All of
ubuntu/linux-image-kvm<5.13.0.1010.10
5.13.0.1010.10
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-1011-aws<5.13.0-1011.12
5.13.0-1011.12
Ubuntu=21.10
All of
ubuntu/linux-image-generic-lpae<5.13.0.27.37
5.13.0.27.37
Ubuntu=21.10
All of
ubuntu/linux-image-5.13.0-27-generic-64k<5.13.0-27.29
5.13.0-27.29
Ubuntu=21.10
All of
ubuntu/linux-image-lowlatency<5.13.0.27.37
5.13.0.27.37
Ubuntu=21.10
All of
ubuntu/linux-image-5.11.0-1027-azure<5.11.0-1027.30
5.11.0-1027.30
Ubuntu=21.04
All of
ubuntu/linux-image-generic-64k<5.11.0.49.48
5.11.0.49.48
Ubuntu=21.04
All of
ubuntu/linux-image-generic<5.11.0.49.48
5.11.0.49.48
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-1027-oracle<5.11.0-1027.30
5.11.0-1027.30
Ubuntu=21.04
All of
ubuntu/linux-image-aws<5.11.0.1027.26
5.11.0.1027.26
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-49-generic-64k<5.11.0-49.55
5.11.0-49.55
Ubuntu=21.04
All of
ubuntu/linux-image-raspi<5.11.0.1027.24
5.11.0.1027.24
Ubuntu=21.04
All of
ubuntu/linux-image-gke<5.11.0.1028.26
5.11.0.1028.26
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-49-lowlatency<5.11.0-49.55
5.11.0-49.55
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-1024-kvm<5.11.0-1024.27
5.11.0-1024.27
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-1027-raspi<5.11.0-1027.30
5.11.0-1027.30
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-49-generic-lpae<5.11.0-49.55
5.11.0-49.55
Ubuntu=21.04
All of
ubuntu/linux-image-azure<5.11.0.1027.26
5.11.0.1027.26
Ubuntu=21.04
All of
ubuntu/linux-image-raspi-nolpae<5.11.0.1027.24
5.11.0.1027.24
Ubuntu=21.04
All of
ubuntu/linux-image-oem-20.04<5.11.0.49.48
5.11.0.49.48
Ubuntu=21.04
All of
ubuntu/linux-image-virtual<5.11.0.49.48
5.11.0.49.48
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-1027-raspi-nolpae<5.11.0-1027.30
5.11.0-1027.30
Ubuntu=21.04
All of
ubuntu/linux-image-gcp<5.11.0.1028.26
5.11.0.1028.26
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-1027-aws<5.11.0-1027.30
5.11.0-1027.30
Ubuntu=21.04
All of
ubuntu/linux-image-oracle<5.11.0.1027.26
5.11.0.1027.26
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-49-generic<5.11.0-49.55
5.11.0-49.55
Ubuntu=21.04
All of
ubuntu/linux-image-kvm<5.11.0.1024.24
5.11.0.1024.24
Ubuntu=21.04
All of
ubuntu/linux-image-generic-lpae<5.11.0.49.48
5.11.0.49.48
Ubuntu=21.04
All of
ubuntu/linux-image-5.11.0-1028-gcp<5.11.0-1028.32
5.11.0-1028.32
Ubuntu=21.04
All of
ubuntu/linux-image-lowlatency<5.11.0.49.48
5.11.0.49.48
Ubuntu=21.04
All of
ubuntu/linux-image-gkeop<5.4.0.1031.34
5.4.0.1031.34
Ubuntu=20.04
All of
ubuntu/linux-image-virtual<5.4.0.96.100
5.4.0.96.100
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1053-kvm<5.4.0-1053.55
5.4.0-1053.55
Ubuntu=20.04
All of
ubuntu/linux-image-5.11.0-1027-oracle<5.11.0-1027.30~20.04.1
5.11.0-1027.30~20.04.1
Ubuntu=20.04
All of
ubuntu/linux-image-aws<5.11.0.1027.30~20.04.25
5.11.0.1027.30~20.04.25
Ubuntu=20.04
All of
ubuntu/linux-image-5.14.0-1020-oem<5.14.0-1020.22
5.14.0-1020.22
Ubuntu=20.04
All of
ubuntu/linux-image-ibm-lts-20.04<5.4.0.1012.13
5.4.0.1012.13
Ubuntu=20.04
All of
ubuntu/linux-image-gkeop-5.4<5.4.0.1031.34
5.4.0.1031.34
Ubuntu=20.04
All of
ubuntu/linux-image-azure<5.11.0.1027.30~20.04.25
5.11.0.1027.30~20.04.25
Ubuntu=20.04
All of
ubuntu/linux-image-5.10.0-1057-oem<5.10.0-1057.61
5.10.0-1057.61
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1050-raspi<5.4.0-1050.56
5.4.0-1050.56
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-96-generic-lpae<5.4.0-96.109
5.4.0-96.109
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1031-gkeop<5.4.0-1031.32
5.4.0-1031.32
Ubuntu=20.04
All of
ubuntu/linux-image-oracle-lts-20.04<5.4.0.1061.61
5.4.0.1061.61
Ubuntu=20.04
All of
ubuntu/linux-image-kvm<5.4.0.1053.52
5.4.0.1053.52
Ubuntu=20.04
All of
ubuntu/linux-image-5.11.0-1028-gcp<5.11.0-1028.32~20.04.1
5.11.0-1028.32~20.04.1
Ubuntu=20.04
All of
ubuntu/linux-image-lowlatency<5.4.0.96.100
5.4.0.96.100
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1061-oracle<5.4.0-1061.65
5.4.0-1061.65
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1062-gcp<5.4.0-1062.66
5.4.0-1062.66
Ubuntu=20.04
All of
ubuntu/linux-image-oem-osp1<5.4.0.96.100
5.4.0.96.100
Ubuntu=20.04
All of
ubuntu/linux-image-gke-5.4<5.4.0.1059.69
5.4.0.1059.69
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1059-gke<5.4.0-1059.62
5.4.0-1059.62
Ubuntu=20.04
All of
ubuntu/linux-image-oem-20.04c<5.13.0.1028.30
5.13.0.1028.30
Ubuntu=20.04
All of
ubuntu/linux-image-oem-20.04b<5.10.0.1057.57
5.10.0.1057.57
Ubuntu=20.04
All of
ubuntu/linux-image-oem-20.04d<5.14.0.1020.17
5.14.0.1020.17
Ubuntu=20.04
All of
ubuntu/linux-image-ibm<5.4.0.1012.13
5.4.0.1012.13
Ubuntu=20.04
All of
ubuntu/linux-image-gcp<5.11.0.1028.32~20.04.26
5.11.0.1028.32~20.04.26
Ubuntu=20.04
All of
ubuntu/linux-image-generic-lpae<5.4.0.96.100
5.4.0.96.100
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-96-lowlatency<5.4.0-96.109
5.4.0-96.109
Ubuntu=20.04
All of
ubuntu/linux-image-oem<5.4.0.96.100
5.4.0.96.100
Ubuntu=20.04
All of
ubuntu/linux-image-5.11.0-1027-aws<5.11.0-1027.30~20.04.1
5.11.0-1027.30~20.04.1
Ubuntu=20.04
All of
ubuntu/linux-image-bluefield<5.4.0.1025.26
5.4.0.1025.26
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1025-bluefield<5.4.0-1025.28
5.4.0-1025.28
Ubuntu=20.04
All of
ubuntu/linux-image-gke<5.4.0.1059.69
5.4.0.1059.69
Ubuntu=20.04
All of
ubuntu/linux-image-aws-lts-20.04<5.4.0.1063.65
5.4.0.1063.65
Ubuntu=20.04
All of
ubuntu/linux-image-azure-lts-20.04<5.4.0.1067.65
5.4.0.1067.65
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1067-azure<5.4.0-1067.70
5.4.0-1067.70
Ubuntu=20.04
All of
ubuntu/linux-image-oracle<5.11.0.1027.30~20.04.19
5.11.0.1027.30~20.04.19
Ubuntu=20.04
All of
ubuntu/linux-image-raspi<5.4.0.1050.84
5.4.0.1050.84
Ubuntu=20.04
All of
ubuntu/linux-image-generic<5.4.0.96.100
5.4.0.96.100
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-96-generic<5.4.0-96.109
5.4.0-96.109
Ubuntu=20.04
All of
ubuntu/linux-image-5.11.0-1027-azure<5.11.0-1027.30~20.04.1
5.11.0-1027.30~20.04.1
Ubuntu=20.04
All of
ubuntu/linux-image-5.4.0-1012-ibm<5.4.0-1012.13
5.4.0-1012.13
Ubuntu=20.04
All of
ubuntu/linux-image-oem-20.04<5.10.0.1057.57
5.10.0.1057.57
Ubuntu=20.04
All of
ubuntu/linux-image-raspi2<5.4.0.1050.84
5.4.0.1050.84
Ubuntu=20.04
All of
ubuntu/linux-image-gcp-lts-20.04<5.4.0.1062.72
5.4.0.1062.72
Ubuntu=20.04
All of
ubuntu/linux-image-5.13.0-1028-oem<5.13.0-1028.35
5.13.0-1028.35
Ubuntu=20.04
All of
ubuntu/linux-image-generic-lpae-hwe-18.04<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-generic-hwe-18.04<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-snapdragon-hwe-18.04<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-96-lowlatency<5.4.0-96.109~18.04.1
5.4.0-96.109~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-oem<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-aws<5.4.0.1063.45
5.4.0.1063.45
Ubuntu=18.04
All of
ubuntu/linux-image-lowlatency-hwe-18.04<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-96-generic<5.4.0-96.109~18.04.1
5.4.0-96.109~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-raspi-hwe-18.04<5.4.0.1050.52
5.4.0.1050.52
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-1061-oracle<5.4.0-1061.65~18.04.1
5.4.0-1061.65~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-oem-osp1<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-gkeop-5.4<5.4.0.1031.32~18.04.31
5.4.0.1031.32~18.04.31
Ubuntu=18.04
All of
ubuntu/linux-image-azure<5.4.0.1067.46
5.4.0.1067.46
Ubuntu=18.04
All of
ubuntu/linux-image-virtual-hwe-18.04<5.4.0.96.109~18.04.84
5.4.0.96.109~18.04.84
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-1062-gcp<5.4.0-1062.66~18.04.1
5.4.0-1062.66~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-gcp<5.4.0.1062.47
5.4.0.1062.47
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-1050-raspi<5.4.0-1050.56~18.04.1
5.4.0-1050.56~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-1067-azure<5.4.0-1067.70~18.04.1
5.4.0-1067.70~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-96-generic-lpae<5.4.0-96.109~18.04.1
5.4.0-96.109~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-oracle<5.4.0.1061.65~18.04.40
5.4.0.1061.65~18.04.40
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-1031-gkeop<5.4.0-1031.32~18.04.1
5.4.0-1031.32~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-5.4.0-1059-gke<5.4.0-1059.62~18.04.1
5.4.0-1059.62~18.04.1
Ubuntu=18.04
All of
ubuntu/linux-image-gke-5.4<5.4.0.1059.62~18.04.23
5.4.0.1059.62~18.04.23
Ubuntu=18.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-5240-1?

    The severity of USN-5240-1 is categorized as important due to the potential for denial of service and arbitrary code execution.

  • How do I fix USN-5240-1?

    To fix USN-5240-1, users should update their Linux kernel to the patched versions recommended by Ubuntu.

  • What systems are affected by USN-5240-1?

    USN-5240-1 affects Ubuntu 21.10 systems running specific versions of the Linux kernel.

  • Can USN-5240-1 be exploited remotely?

    No, USN-5240-1 requires local access for an attacker to exploit the vulnerability.

  • Is there a workaround for USN-5240-1?

    There are no known workarounds for USN-5240-1 other than applying the recommended updates.

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