LSN-0077-1

Advisory lineage Upstream: 2 Downstream: 0
Published: 17 May 2021, 07:04
Last modified:03 Jun 2026, 13:33

Vulnerability Summary

Overall Risk (default)
minimal
0/100
CVSS Score
No data
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

17 May 2021, 07:04
Published
Vulnerability first disclosed
03 Jun 2026, 13:33
Last Modified
Vulnerability information updated

Description

Kernel Live Patch Security Notice Vincent Dehors discovered that the shiftfs file system in the Ubuntu Linux kernel did not properly handle faults in copy_from_user() when passing through ioctls to an underlying file system. A local attacker could use this to cause a denial of service (memory exhaustion) or execute arbitrary code.(CVE-2021-3492)

Affected Systems

  • ubuntu•linux

    all | < 5.4.0-72.80

  • ubuntu•linux-gcp

    all | < 5.4.0-1042.45

  • ubuntu•linux-gke

    all | < 5.4.0-1042.44

  • ubuntu•linux-gke-5.4

    all | < 5.4.0-1042.44~18.04.1

  • ubuntu•linux-gkeop

    all | < 5.4.0-1014.15

  • ubuntu•linux-gkeop-5.4

    all | < 5.4.0-1014.15~18.04.1

  • ubuntu•linux-hwe-5.4

    all | < 5.4.0-72.80~18.04.1

References (2)