UBUNTU-CVE-2017-15126

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2017-15126
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-15126.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2017-15126
Upstream
Published
2018-01-14T06:29:00Z
Modified
2025-07-18T16:44:10Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 8.1 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfdctxput().

References

Affected packages

Ubuntu:16.04:LTS / linux-azure

Package

Name
linux-azure
Purl
pkg:deb/ubuntu/linux-azure@4.13.0-1005.7?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.13.0-1005.7

Affected versions

4.*

4.11.0-1009.9
4.11.0-1011.11
4.11.0-1013.13
4.11.0-1014.14
4.11.0-1015.15
4.11.0-1016.16

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-azure-cloud-tools-4.13.0-1005"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-azure-cloud-tools-4.13.0-1005-dbgsym"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-azure-headers-4.13.0-1005"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-azure-tools-4.13.0-1005"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-azure-tools-4.13.0-1005-dbgsym"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-cloud-tools-4.13.0-1005-azure"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-headers-4.13.0-1005-azure"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-image-4.13.0-1005-azure"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-image-4.13.0-1005-azure-dbgsym"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-image-extra-4.13.0-1005-azure"
        },
        {
            "binary_version": "4.13.0-1005.7",
            "binary_name": "linux-tools-4.13.0-1005-azure"
        }
    ],
    "availability": "No subscription required"
}