Resource management error in Linux kernel dma

1) Resource management error

EUVDB-ID: #VU93598

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-2021-47374

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to resource management error within the add_dma_entry() function in kernel/dma/debug.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.14 - 5.15 rc7

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.14:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14:rc7:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14.0-49.el9:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.14.3:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6a
https://git.kernel.org/stable/c/510e1a724ab1bf38150be2c1acabb303f98d0047
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.9
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15

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.