PT-2024-11834 · Linux+5 · Linux Kernel+5
Lin Liu
·
Published
2022-12-05
·
Updated
2025-09-29
·
CVE-2022-48969
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A vulnerability in the Linux kernel's xen-netfront component is related to resource management errors in the
netfront resume() function. The issue arises when a NAPI is set up for each network sring to poll data to the kernel. During live migration, the sring with the source host is destroyed before the migration, and a new sring with the target host is set up after the migration. However, the NAPI for the old sring is not deleted until the new sring with the target host is set up after the migration. With busy poll/busy read enabled, the NAPI can be polled before it is deleted when the VM is resumed, leading to a kernel NULL pointer dereference. The estimated number of potentially affected devices worldwide is not available. There is no information about real-world incidents where this issue was exploited.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
NULL Pointer Dereference
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Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linux Kernel
Red Hat
Red Os
Suse