CVE-2021-4115

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

Affected

polkitd

CVSS v3.1 NVD

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

2.1 LOWAV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.53% chance of exploitation in the next 30 days, 43rd percentile

Published

2022-02-21

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://gitlab.freedesktop.org/polkit/polkit/-/issues/141

Exploit collections (1)

• polkit/file_descriptor_exhaustion_CVE-2021-4115github/securitylab

Security advisories

• https://access.redhat.com/security/cve/cve-2021-4115
• https://gitlab.com/redhat/centos-stream/rpms/polkit/-/merge_requests/6/diffs?commit_id=bf…
• https://www.oracle.com/security-alerts/cpujul2022.html

References

• CVE Record
• NVD entry