Tracker / CVE-2020-29569
CVE-2020-29569
Alta 8.8
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.
Prodotti e versioni affette
| debian | debian_linux |
|---|---|
| linux | linux_kernel · 4.1.44 → 4.2 |
| linux | linux_kernel · 4.11.9 → 4.12 |
| linux | linux_kernel · 4.12 → 4.14.213 |
| linux | linux_kernel · 4.15 → 4.19.164 |
| linux | linux_kernel · 4.20 → 5.4.86 |
| linux | linux_kernel · 4.4.80 → 4.4.254 |
| linux | linux_kernel · 4.9.36 → 4.9.249 |
| linux | linux_kernel · 5.5 → 5.10.4 |
| netapp | hci_compute_node_bios |
| netapp | solidfire_\&_hci_management_node |
| netapp | solidfire_\&_hci_storage_node |
| xen | xen · … → 4.14.1 |
Analisi
Questa pagina non è ancora indicizzabile.Finché non contiene un’analisi originale — cosa espone davvero, come verificare in due minuti se un sistema è stato toccato, cosa fare se lo è stato — la pagina resta noindex. È il database a deciderlo, non il modello di pagina.