#VU104614 NULL pointer dereference in Linux kernel - CVE-2022-49699

Vulnerability identifier: #VU104614

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-2022-49699

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 filemap_get_read_batch() function in mm/filemap.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.18, 5.18 rc1, 5.18 rc2, 5.18 rc3, 5.18 rc5, 5.18 rc6, 5.18 rc7, 5.18 rc8, 5.18.1, 5.18.2, 5.18.3, 5.18.4, 5.18.5, 5.18.6, 5.18.7, 5.19 rc1, 5.19 rc4, 5.19 rc5, 5.19 rc6

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External links
https://git.kernel.org/stable/c/a66f131d30e53000f08301776bf85c912ef47aad
https://git.kernel.org/stable/c/cb995f4eeba9d268fd4b56c2423ad6c1d1ea1b82
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18.8
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19

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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.