Rapid7 Vulnerability & Exploit Database

Amazon Linux AMI: CVE-2021-26930: Security patch for kernel (ALAS-2021-1487)

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

Amazon Linux AMI: CVE-2021-26930: Security patch for kernel (ALAS-2021-1487)

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
02/17/2021
Created
03/23/2021
Added
03/20/2021
Modified
10/14/2022

Description

An issue was discovered in the Linux kernel 3.11 through 5.10.16, as used by Xen. To service requests to the PV backend, the driver maps grant references provided by the frontend. In this process, errors may be encountered. In one case, an error encountered earlier might be discarded by later processing, resulting in the caller assuming successful mapping, and hence subsequent operations trying to access space that wasn't mapped. In another case, internal state would be insufficiently updated, preventing safe recovery from the error. This affects drivers/block/xen-blkback/blkback.c.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2021-1487
  • CVE-2021-26930
  • USN-4904-1
  • USN-4909-1
  • USN-4946-1
  • USN-4949-1

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

;