PT-2021-8226 · Linux+3 · Linux Kernel+3

Published 2021-12-10 · Updated 2026-03-14 · CVE-2021-47577

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a race condition in the io-wq component of the Linux kernel, where a gap exists between checking for exit and adding new worker task work. This gap can lead to a situation where task work is added after existing creations have been canceled at exit time. The problem is resolved by checking the EXIT bit after adding the creation task work and running the same cancellation as the exit does if it is set.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Race Condition

Weakness Enumeration

CWE-399

CWE-362

Related Identifiers

BDU:2024-11539

CVE-2021-47577

OPENSUSE-SU-2024_2372-1

OPENSUSE-SU-2024_2394-1

SUSE-SU-2024:2372-1

SUSE-SU-2024:2394-1

SUSE-SU-2024:2939-1

Affected Products

Debian

Linux Kernel

Red Os

Suse

References · 1180

• https://git.kernel.org/stable/c/4b4e5bbf9386d4ec21d91c0cb0fd60b9bba778ec · Patch
• https://git.kernel.org/stable/c/71a85387546e50b1a37b0fa45dadcae3bfb35cf6 · Patch
• http://repo.red-soft.ru/redos/7.3c/x86_64/updates · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2021-47577 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2939-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:2394-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-47577 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-47577 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-47577 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-47577 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-11539 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47577 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2024:2372-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-47577 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47577 · Vendor Advisory