CVE-2024-49936

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvif_flush_hash() During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free. Therefore, to solve this, you need to change it to list_for_each_entry_safe.

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < 3c4423b0c4b98213b3438e15061e1d08220e6982, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < a0465723b8581cad27164c9073fd780904cd22d4, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < efcff6ce7467f01f0753609f420333f3f2ceceda, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < 143edf098b80669d05245b2f2367dd156a83a2c5, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < d408889d4b54f5501e4becc4dbbb9065143fbf4e, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < 54d8639af5568fc41c0e274fc3ec9cf86c59fcbb, >= 40d8abdee806d496a60ee607a6d01b1cd7fabaf0 < 0fa5e94a1811d68fbffa0725efe6d4ca62c03d12, >= 4.7, < 5.10.227, >= 5.11 < 5.15.168, >= 5.16 < 6.1.113, >= 6.2 < 6.6.55, >= 6.7 < 6.10.14, >= 6.11 < 6.11.3

Fixed versions

5.10.227, 5.15.168, 6.1.113, 6.6.55, 6.10.14, 6.11.3

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416