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.
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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2021-02-17T00:00:00
Updated: 2024-08-03T20:33:41.395Z
Reserved: 2021-02-09T00:00:00
Link: CVE-2021-26930
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-02-17T01:15:13.157
Modified: 2024-03-25T01:15:50.033
Link: CVE-2021-26930
Redhat
No data.