usn-4727-1
Vulnerability from osv_ubuntu
Published
2021-02-10 00:54
Modified
2026-02-10 04:42
Summary
linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oracle, linux-raspi vulnerability
Details
Alexander Popov discovered that multiple race conditions existed in the AF_VSOCK implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-26708",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "block-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "block-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "block-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "crypto-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "crypto-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "crypto-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "dasd-extra-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "dasd-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fat-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fat-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fat-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fb-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "firewire-core-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "floppy-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fs-core-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fs-core-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fs-core-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fs-secondary-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fs-secondary-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "fs-secondary-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "input-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "input-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "input-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "ipmi-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "ipmi-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "ipmi-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "kernel-image-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "kernel-image-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "kernel-image-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-buildinfo-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-buildinfo-5.8.0-43-generic-64k",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-buildinfo-5.8.0-43-generic-lpae",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-buildinfo-5.8.0-43-lowlatency",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-cloud-tools-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-cloud-tools-5.8.0-43-lowlatency",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-headers-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-headers-5.8.0-43-generic-64k",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-headers-5.8.0-43-generic-lpae",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-headers-5.8.0-43-lowlatency",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-cloud-tools-5.8.0-43",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-cloud-tools-common",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-headers-5.8.0-43",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-source-5.8.0",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-tools-5.8.0-43",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-tools-common",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-tools-host",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-udebs-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-udebs-generic-64k",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-hwe-5.8-udebs-generic-lpae",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-image-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-image-5.8.0-43-generic-lpae",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-image-unsigned-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-image-unsigned-5.8.0-43-generic-64k",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-image-unsigned-5.8.0-43-lowlatency",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-modules-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-modules-5.8.0-43-generic-64k",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-modules-5.8.0-43-generic-lpae",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-modules-5.8.0-43-lowlatency",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-modules-extra-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-tools-5.8.0-43-generic",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-tools-5.8.0-43-generic-64k",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-tools-5.8.0-43-generic-lpae",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "linux-tools-5.8.0-43-lowlatency",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "md-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "md-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "md-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "message-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "message-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "mouse-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "mouse-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "mouse-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "multipath-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "multipath-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "multipath-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nfs-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nfs-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nfs-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-pcmcia-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-shared-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-shared-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-shared-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-usb-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-usb-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "nic-usb-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "parport-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "parport-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "parport-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "pata-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "pcmcia-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "pcmcia-storage-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "plip-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "plip-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "plip-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "ppp-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "ppp-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "ppp-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "sata-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "sata-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "sata-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "scsi-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "scsi-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "scsi-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "serial-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "storage-core-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "storage-core-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "storage-core-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "usb-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "usb-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "usb-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "virtio-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "virtio-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "vlan-modules-5.8.0-43-generic-64k-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "vlan-modules-5.8.0-43-generic-di",
"binary_version": "5.8.0-43.49~20.04.1"
},
{
"binary_name": "vlan-modules-5.8.0-43-generic-lpae-di",
"binary_version": "5.8.0-43.49~20.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "linux-hwe-5.8",
"purl": "pkg:deb/ubuntu/linux-hwe-5.8@5.8.0-43.49~20.04.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.8.0-43.49~20.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.8.0-23.24~20.04.1",
"5.8.0-25.26~20.04.1",
"5.8.0-28.30~20.04.1",
"5.8.0-29.31~20.04.1",
"5.8.0-31.33~20.04.1",
"5.8.0-33.36~20.04.1",
"5.8.0-34.37~20.04.2",
"5.8.0-36.40~20.04.1",
"5.8.0-38.43~20.04.1",
"5.8.0-40.45~20.04.1",
"5.8.0-41.46~20.04.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-26708",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "high",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "linux-buildinfo-5.6.0-1047-oem",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-headers-5.6.0-1047-oem",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-image-unsigned-5.6.0-1047-oem",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-modules-5.6.0-1047-oem",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-oem-5.6-headers-5.6.0-1047",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-oem-5.6-tools-5.6.0-1047",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-oem-5.6-tools-host",
"binary_version": "5.6.0-1047.51"
},
{
"binary_name": "linux-tools-5.6.0-1047-oem",
"binary_version": "5.6.0-1047.51"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "linux-oem-5.6",
"purl": "pkg:deb/ubuntu/linux-oem-5.6@5.6.0-1047.51?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.6.0-1047.51"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.6.0-1007.7",
"5.6.0-1008.8",
"5.6.0-1010.10",
"5.6.0-1011.11",
"5.6.0-1013.13",
"5.6.0-1017.17",
"5.6.0-1018.18",
"5.6.0-1020.20",
"5.6.0-1021.21",
"5.6.0-1023.23",
"5.6.0-1026.26",
"5.6.0-1027.27",
"5.6.0-1028.28",
"5.6.0-1031.32",
"5.6.0-1032.33",
"5.6.0-1033.35",
"5.6.0-1034.36",
"5.6.0-1035.37",
"5.6.0-1036.39",
"5.6.0-1039.43",
"5.6.0-1042.46"
]
}
],
"aliases": [],
"details": "Alexander Popov discovered that multiple race conditions existed in the\nAF_VSOCK implementation in the Linux kernel. A local attacker could use\nthis to cause a denial of service (system crash) or execute arbitrary code.\n",
"id": "USN-4727-1",
"modified": "2026-02-10T04:42:03Z",
"published": "2021-02-10T00:54:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4727-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-26708"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "linux, linux-aws, linux-azure, linux-gcp, linux-hwe-5.8, linux-kvm, linux-oem-5.6, linux-oracle, linux-raspi vulnerability",
"upstream": [
"UBUNTU-CVE-2021-26708"
]
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
Loading…
Loading…