#VU104624 NULL pointer dereference in Linux kernel - CVE-2022-49070

Vulnerability identifier: #VU104624

Vulnerability 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-2022-49070

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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 do_remove_conflicting_framebuffers() function in drivers/video/fbdev/core/fbmem.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.17, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12, 5.17.1, 5.17.2

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External links
https://git.kernel.org/stable/c/0f525289ff0ddeb380813bd81e0f9bdaaa1c9078
https://git.kernel.org/stable/c/2388f826cdc9af2651991adc0feb79de9bdf2232
https://git.kernel.org/stable/c/de33df481545974ba47c46f05194e769e4307843
https://git.kernel.org/stable/c/feed87ff122b1640c221d4dd559442ab2cd50bb1
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.3

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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.