NULL pointer dereference in Linux kernel dma idxd driver



| Updated: 2025-05-12
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-48868
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: #VU96348

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-2022-48868

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 __drv_enable_wq() function in drivers/dma/idxd/device.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15 - 6.2 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/0f150134dd795ffcd60b798a85ab737d8d010fb7
https://git.kernel.org/stable/c/99dc4520b74e7ca8e9dc9abe37a0b10b49467960
https://git.kernel.org/stable/c/b51b75f0604f17c0f6f3b6f68f1a521a5cc6b04f
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.90
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.8
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2


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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