NULL pointer dereference in Linux kernel net xen-netback driver



| Updated: 2025-05-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-49649
CWE-ID CWE-476
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) NULL pointer dereference

EUVDB-ID: #VU104610

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49649

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the xenvif_rx_action() function in drivers/net/xen-netback/rx.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.18 - 5.18.12

CPE2.3 External links

https://git.kernel.org/stable/c/5a071aefd6414af5a20321ab58a0557b81993687
https://git.kernel.org/stable/c/7425479d20f9e96f7c3ec8e8a93fe0d7478724cb
https://git.kernel.org/stable/c/94e8100678889ab428e68acadf042de723f094b9
https://git.kernel.org/stable/c/b99174ac57fe5d8867448c03b23828e63f24cb1c
https://git.kernel.org/stable/c/b9c32a6886af79d6e0ad87a7b01800ed079cdd02
https://git.kernel.org/stable/c/c0fcceb5f3f1ec197c014fe218c2f28108cacd27
https://git.kernel.org/stable/c/d5320c6a27aa975aff740f9cb481dcbde48f4348
https://git.kernel.org/stable/c/f0b5c819b062df8bf5f2acf4697e3871cb3722da
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.13


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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