Use-after-free in Linux kernel dma driver

1) Use-after-free

EUVDB-ID: #VU106178

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-49753

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the dma_chan_get() function in drivers/dma/dmaengine.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.14 - 6.2 rc7

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.14:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.0:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.14.7:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/142d644fd2cc059ffa042fbfb68e766433ef3afd
https://git.kernel.org/stable/c/18dd3b30d4c7e8440c63118c7a7b687372b9567f
https://git.kernel.org/stable/c/1b409e14b4b7af034e0450f95c165b6c5c87dbc1
https://git.kernel.org/stable/c/42ecd72f02cd657b00b559621e7ef7d2c4d3e5f1
https://git.kernel.org/stable/c/71c601965532c38030133535f7cd93c1efa75af1
https://git.kernel.org/stable/c/c6221afe573413fd2981e291f7df4a58283e0654
https://git.kernel.org/stable/c/f3dc1b3b4750851a94212dba249703dd0e50bb20
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.305
https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.272
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.166
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.91
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.231
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.9
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.