| ID |
CVE-2020-29569
|
| Sažetak |
An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback. |
| Reference |
|
| CVSS |
| Base: | 7.2 |
| Impact: | 10.0 |
| Exploitability: | 3.9 |
|
| Pristup |
| Vektor | Složenost | Autentikacija |
| LOCAL |
LOW |
NONE |
|
| Impact |
| Povjerljivost | Cjelovitost | Dostupnost |
| COMPLETE |
COMPLETE |
COMPLETE |
|
| CVSS vektor |
AV:L/AC:L/Au:N/C:C/I:C/A:C |
| Zadnje važnije ažuriranje |
19-01-2023 - 15:53 |
| Objavljeno |
15-12-2020 - 17:15 |
