USN-4876-1

Advisory lineage Upstream: 6 Downstream: 0
Published: 16 Mar 2021, 05:38
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

16 Mar 2021, 05:38
Published
Vulnerability first disclosed
03 Jun 2026, 13:33
Last Modified
Vulnerability information updated

Description

linux, linux-aws, linux-kvm, linux-lts-xenial, linux-raspi2, linux-snapdragon vulnerabilities Olivier Benjamin and Pawel Wieczorkiewicz discovered a race condition the Xen paravirt block backend in the Linux kernel, leading to a use-after-free vulnerability. An attacker in a guest VM could use this to cause a denial of service in the host OS. (CVE-2020-29569) It was discovered that the Marvell WiFi-Ex device driver in the Linux kernel did not properly validate ad-hoc SSIDs. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2020-36158) 吴异 discovered that the NFS implementation in the Linux kernel did not properly prevent access outside of an NFS export that is a subdirectory of a file system. An attacker could possibly use this to bypass NFS access restrictions. (CVE-2021-3178)

Affected Systems

  • ubuntu•linux

    < 4.4.0-204.236

  • ubuntu•linux-aws

    < 4.4.0-1087.91 | < 4.4.0-1123.137

  • ubuntu•linux-kvm

    < 4.4.0-1089.98

  • ubuntu•linux-lts-xenial

    < 4.4.0-204.236~14.04.1

  • ubuntu•linux-raspi2

    < 4.4.0-1147.157

  • ubuntu•linux-snapdragon

    < 4.4.0-1151.161

References (4)