CVE-2021-26931
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- CVE-2021-26931
CVE Details
| Release Date: | 2021-02-17 |
Description
An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as used in Xen. Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions), it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. This affects drivers/block/xen-blkback/blkback.c and drivers/xen/xen-scsiback.c.
See more information about CVE-2021-26931 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: | 5.5 | Base Metrics: | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | Low | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | None |
| Integrity Impact: | None | 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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