CVE-2021-4023 — Sensitive Information Exposure in Linux

CWE-200 — Sensitive Information Exposure6 documents6 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 91.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Linux KernelDebian LinuxFedoraproject Fedora+1 more
Timeline
PublishedMar 10
Latest updateMar 11

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages5 packages

▶Debianlinux/linux_kernel< 5.15.3-1+2
▶CVEListV5linux/linux_kernelkernel versions prior to 5.15-rc1
▶debiandebian/linux< linux 5.15.3-1 (bookworm)

Also affects: Fedora 35

Patches

Patch: bugzilla.redhat.com ↗Patch: bugzilla.redhat.com ↗

🔴Vulnerability Details

2
GHSA
GHSA-rfvh-hg5j-x539: A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5↗2022-03-11
▶
OSV
CVE-2021-4023: A flaw was found in the io-workqueue implementation in the Linux kernel versions prior to 5↗2022-03-10
▶

📋Vendor Advisories

3
Microsoft
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↗2022-03-08
▶
Red Hat
kernel: Improper IO-uring request cancellation operation allows local users to cause a crash↗2021-09-08
▶
Debian
CVE-2021-4023: linux - A flaw was found in the io-workqueue implementation in the Linux kernel versions...↗2021
▶