Privilege escalation in Linux kernel PCMCIA support

1) Use-after-free

EUVDB-ID: #VU83412

Risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-44034

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows an attacker to execute arbitrary code.

The vulnerability exists due to a use-after-free error within the drivers/char/pcmcia/scr24x_cs.c caused by a race between scr24x_open() and scr24x_remove(). An attacker with physical access to device can trigger a use-after-free error and execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.0 - 6.0.6

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.0.5:*:*:*:*:*:*:*

External links

https://lore.kernel.org/lkml/20220919101825.GA313940@ubuntu/
https://lore.kernel.org/lkml/20220916050333.GA188358@ubuntu/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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