CVE-2021-28691
High
Description
Guest triggered use-after-free in Linux xen-netback A malicious or buggy network PV frontend can force Linux netback to disable the interface and terminate the receive kernel thread associated with queue 0 in response to the frontend sending a malformed packet. Such kernel thread termination will lead to a use-after-free in Linux netback when the backend is destroyed, as the kernel thread associated with queue 0 will have already exited and thus the call to kthread_stop will be performed against a stale pointer.
SeverityHigh
CVSS7.8
Exploit probability30. percentile0.4%
Product
Linux Kernel
PublishedJun 29, 2021
First seenJun 29, 2021
How to fix
Update
- linux linux_kernel5.10.43 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.5.0 ≤ v < 5.10.43 | 5.10.43 |
| netapp solidfire_baseboard_management_controller | No range specified | — |
| netapp cloud_backup | No range specified | — |
| netapp h410c_firmware | No range specified | — |
| netapp h300s_firmware | No range specified | — |
| netapp h500s_firmware | No range specified | — |
| netapp h700s_firmware | No range specified | — |
| netapp h300e_firmware | No range specified | — |
| netapp h500e_firmware | No range specified | — |
| netapp h700e_firmware | No range specified | — |
| netapp h410s_firmware | No range specified | — |
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