PT-2021-8163 · Linux+7 · Linux Kernel+7
Guanghui Feng
·
Published
2021-10-18
·
Updated
2025-03-21
·
CVE-2021-47185
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a softlockup in the Linux kernel's tty buffer component, specifically in the
flush to ldisc function. This occurs when the sender and workqueue are running on different cores, and the sender sends data rapidly, causing the workqueue to loop indefinitely and resulting in a softlockup. The problem is resolved by adding need resched check and cond resched in the flush to ldisc loop.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Locking
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Astra Linux
Centos
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse