CVE-2021-26930 Affecting kernel-uek-container-debug package, versions <0:5.4.17-2036.104.4.el7


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-ORACLE7-KERNELUEKCONTAINERDEBUG-2597713
  • published10 Apr 2022
  • disclosed17 Feb 2021

Introduced: 17 Feb 2021

CVE-2021-26930  (opens in a new tab)

How to fix?

Upgrade Oracle:7 kernel-uek-container-debug to version 0:5.4.17-2036.104.4.el7 or higher.
This issue was patched in ELSA-2021-9086.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-container-debug package and not the kernel-uek-container-debug package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1