NULL pointer dereference in Linux kernel char tpm driver

1) NULL pointer dereference

EUVDB-ID: #VU104552

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-2022-49286

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 tpm2_init_space() function in drivers/char/tpm/tpm2-space.c. A local user can perform a denial of service (DoS) attack.

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/476ddd23f818fb94cf86fb5617f3bb9a7c92113d
https://git.kernel.org/stable/c/5b1d2561a03e534064b51c50c774657833d3d2cf
https://git.kernel.org/stable/c/95193d12f10a8a088843b25e0f5fe1d83ec6b079
https://git.kernel.org/stable/c/ba84f9a48366dcc3cdef978599433efe101dd5bd
https://git.kernel.org/stable/c/eda1662cce964c8a65bb86321f8d9cfa6e9ceaab
https://git.kernel.org/stable/c/fb5abce6b2bb5cb3d628aaa63fa821da8c4600f9

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.