CVE-2021-26933
MEDIUM5.5EPSS 0.08%xen - security update
發布日:2021/2/17修改日:2025/12/3
也稱為:ALPINE-CVE-2021-26933
描述
An issue was discovered in Xen 4.9 through 4.14.x. On Arm, a guest is allowed to control whether memory accesses are bypassing the cache. This means that Xen needs to ensure that all writes (such as the ones during scrubbing) have reached the memory before handing over the page to a guest. Unfortunately, the operation to clean the cache is happening before checking if the page was scrubbed. Therefore there is no guarantee when all the writes will reach the memory.
受影響套件(3)
- Alpine/xenfrom 0, < 4.13.2-r5
- Debian/xenfrom 0, < 4.14.1+11-gb0b734a8b3-1
- Debian/xenfrom 0, < 4.11.4+99-g8bce4698f6-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |