CVE-2024-49936

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12	Patch
https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5	Patch
https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982
https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb	Patch
https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4	Patch
https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c	Patch
https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e	Patch
https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

02 Feb 2025, 11:15

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982 -

Information

Published : 2024-10-21 18:15

Updated : 2025-02-02 11:15

NVD link : CVE-2024-49936

Mitre link : CVE-2024-49936

CVE.ORG link : CVE-2024-49936

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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