#VU104556 NULL pointer dereference in Linux kernel - CVE-2022-49307

Vulnerability identifier: #VU104556

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-2022-49307

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 hdlcdev_init() function in drivers/tty/synclink_gt.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

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External links
https://git.kernel.org/stable/c/078212ad15dbd88840c82c97f12c93d83703c8fd
https://git.kernel.org/stable/c/1ceb4ca9543a8a788febf6bc8dad2e605e172d5e
https://git.kernel.org/stable/c/50c341f9a2adc4c32a8ad5a39eb99d9c4a419e0d
https://git.kernel.org/stable/c/689ca31c542687709ba21ec2195c1fbce34fd029
https://git.kernel.org/stable/c/8a95696bdc0e13f8980f05b54a3b9081963d1256
https://git.kernel.org/stable/c/ba08cbc5b53e151d0acf1930fb526fc65b7f3e65
https://git.kernel.org/stable/c/d68d5e68b7f64de7170f8e04dd9b995c36b2c71c
https://git.kernel.org/stable/c/ddd67751ab86c6a65f95c35293c42f85a42ac05d
https://git.kernel.org/stable/c/f6e07eb7ebec53ffe81fc2489589320fbe4a6b75

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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.