CVE-2021-26930

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-26930
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26930.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-26930
Downstream
Related
Published
2021-02-17T01:15:13Z
Modified
2025-08-09T19:01:28Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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

Affected packages