CVE-2021-26930
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- CVE-2021-26930
CVE Details
| Release Date: | 2021-02-17 |
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.
See more information about CVE-2021-26930 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 7.8 | Base Metrics: | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | Low | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | High |
| Integrity Impact: | High | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 6 (kernel-uek) | ELSA-2021-9051 | 2021-02-16 |
| Oracle Linux version 6 (kernel-uek) | ELSA-2021-9079 | 2021-03-03 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2021-9051 | 2021-02-16 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2021-9052 | 2021-02-16 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2021-9053 | 2021-02-16 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2021-9067 | 2021-02-19 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2021-9079 | 2021-03-03 |
| Oracle Linux version 7 (kernel-uek) | ELSA-2021-9135 | 2021-03-24 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2021-9057 | 2021-02-16 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2021-9058 | 2021-02-17 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2021-9068 | 2021-02-19 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2021-9086 | 2021-03-09 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2021-9136 | 2021-03-24 |
| Oracle Linux version 8 (kernel-uek) | ELSA-2021-9053 | 2021-02-16 |
| Oracle Linux version 8 (kernel-uek) | ELSA-2021-9085 | 2021-03-11 |
| Oracle Linux version 8 (kernel-uek-container) | ELSA-2021-9057 | 2021-02-16 |
| Oracle Linux version 8 (kernel-uek-container) | ELSA-2021-9086 | 2021-03-09 |
| Oracle VM version 3.4 (kernel-uek) | OVMSA-2021-0006 | 2021-02-17 |
| Oracle VM version 3.4 (kernel-uek) | OVMSA-2021-0007 | 2021-03-04 |
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