CVE-2021-26930

 

Published at: - 17-02-2021 02:15

Last modified: - 26-10-2022 01:44

Total changes: - 10

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• http://xenbits.xen.org/xsa/advisory-365.html
• FEDORA-2021-8d45d297c6-Mailing List, Patch, Third Party Advisory
• FEDORA-2021-7143aca8cb-Mailing List, Patch, Third Party Advisory
• [debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update-Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20210326-0001/
• [debian-lts-announce] 20210330 [SECURITY] [DLA 2610-1] linux-4.19 security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2021-26930

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures