Rapid7 Vulnerability & Exploit Database

Debian: CVE-2021-21781: linux -- security update

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

Debian: CVE-2021-21781: linux -- security update

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
07/22/2021
Created
07/23/2021
Added
07/22/2021
Modified
08/27/2021

Description

An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11

Solution(s)

  • debian-upgrade-linux

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;