Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2021-28691

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 threa

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
XEN

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

  • unspecified to < 4.12unknown
  • 5.5.0 to < unspecifiedaffected
  • next of 5.12.2 to < unspecifiedunaffected

References