CVE-2021-26930

Updated: 2023-11-07 20:02:21.970526

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.


Links NIST CIRCL RHEL Ubuntu

Severity

Severity Score
CVSS Version 2.x MEDIUM 4.6
CVSS Version 3.x HIGH 7.8

Status

OS name Project name Version Score Severity Status Errata Last updated
CentOS 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2022-01-04 14:20:22
CentOS 8.4 ELS kernel 4.18.0 7.8 HIGH Released CLSA-2022:1651145959 2022-04-28 15:59:37
CentOS 8.5 ELS kernel 4.18.0 7.8 HIGH Released CLSA-2022:1651146021 2022-04-28 15:59:04
CloudLinux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2022-03-30 18:50:47
Oracle Linux 6 ELS kernel 2.6.32 7.8 HIGH Not Vulnerable 2022-03-30 18:50:45
Ubuntu 16.04 ELS linux 4.4.0 7.8 HIGH Not Vulnerable 2022-01-26 05:16:09
Ubuntu 16.04 ELS linux-hwe 4.15.0 7.8 HIGH Released 2023-04-27 14:04:58
Ubuntu 18.04 ELS linux 4.15.0 7.8 HIGH Already Fixed 2023-06-02 09:10:29