CVE-2021-26930 Affecting torvalds/linux package, versions [3.11,5.10.17)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.03% (7th percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3005808
  • published26 Jan 2022
  • disclosed17 Feb 2021
  • creditUnknown

Introduced: 17 Feb 2021

CVE-2021-26930  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 5.10.17 or higher.

Overview

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.

CVSS Base Scores

version 3.1