Vulnerability Details : CVE-2021-4023
A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5.15-rc1. The kernel can panic when an improper cancellation operation triggers the submission of new io-uring operations during a shortage of free space. This flaw allows a local user with permissions to execute io-uring requests to possibly crash the system.
Vulnerability category: Information leak
Exploit prediction scoring system (EPSS) score for CVE-2021-4023
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-4023
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
nvd@nist.gov |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
nvd@nist.gov |
CWE ids for CVE-2021-4023
-
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2021-4023
-
https://bugzilla.redhat.com/show_bug.cgi?id=2026484
2026484 – (CVE-2021-4023) CVE-2021-4023 kernel: Improper IO-uring request cancellation operation allows local users to cause a crashIssue Tracking;Patch;Third Party Advisory
Products affected by CVE-2021-4023
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*