CVE-2021-4115
MEDIUMpolkit - Unauthenticated Denial of Service via File Descriptor Exhaustion
Title source: llmDescription
There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion. The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned
References (6)
Core 6
Core References
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VGKWCBS6IDZYYDYM2WIWJM5BL7QQTWPF/
Third Party Advisory
https://access.redhat.com/security/cve/cve-2021-4115
Patch, Third Party Advisory
https://gitlab.com/redhat/centos-stream/rpms/polkit/-/merge_requests/6/diffs?commit_id=bf900df04dc390d389e59aa10942b0f2b15c531e
Exploit, Issue Tracking, Patch, Third Party Advisory
https://gitlab.freedesktop.org/polkit/polkit/-/issues/141
Exploit, Third Party Advisory
http://packetstormsecurity.com/files/172849/polkit-File-Descriptor-Exhaustion.html
Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html
Scores
CVSS v3
5.5
EPSS
0.0009
EPSS Percentile
25.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-400
Status
published
Products (8)
canonical/ubuntu_linux
20.04
canonical/ubuntu_linux
21.10
debian/debian_linux
11.0
fedoraproject/fedora
34
fedoraproject/fedora
35
oracle/zfs_storage_appliance_kit
8.8
polkit_project/polkit
0.117
redhat/enterprise_linux
8.0
Published
Feb 21, 2022
Tracked Since
Feb 18, 2026