Vulnerability · Published Mar 9, 2022 · Assigned by redhat
CVE-2021-4023
Medium 5.5
In plain English
A medium-severity information exposure in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 85.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.15.3-1 | DEBIAN-CVE-2021-4023 |
| Debian:13 | linux | 5.15.3-1 | DEBIAN-CVE-2021-4023 |
| Debian:14 | linux | 5.15.3-1 | DEBIAN-CVE-2021-4023 |
Affected products (as reported)
Weakness: CWE-200
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2026484 x_refsource_MISC