Use-after-free in Linux kernel bus fsl-mc driver

1) Use-after-free

EUVDB-ID: #VU104439

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-2022-49711

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 fsl_mc_bus_remove() function in drivers/bus/fsl-mc/fsl-mc-bus.c. A local user can escalate privileges on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:*:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/161b68b0a728377aaa10a8e14c70e7734f3c9ff7
https://git.kernel.org/stable/c/928ea98252ad75118950941683893cf904541da9
https://git.kernel.org/stable/c/ccd1751092341ac120a961835211f9f2e3735963

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.