#VU104617 NULL pointer dereference in Linux kernel - CVE-2022-49731

Vulnerability identifier: #VU104617

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-2022-49731

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 ata_host_alloc_pinfo() function in drivers/ata/libata-core.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

---

External links
https://git.kernel.org/stable/c/07cbdb4807d369fbda73062a91b570c4dc5ec429
https://git.kernel.org/stable/c/1ac5efee33f29e704226506d429b84575a5d66f8
https://git.kernel.org/stable/c/253334f84c81bc6a43af489f108c0bddad989eef
https://git.kernel.org/stable/c/36cd19e7d4e5571d77a2ed20c5b6ef50cf57734a
https://git.kernel.org/stable/c/a810bd5af06977a847d1f202b22d7defd5c62497
https://git.kernel.org/stable/c/bf476fe22aa1851bab4728e0c49025a6a0bea307
https://git.kernel.org/stable/c/ca4693e6e06e4fd2b240c0fec47aa2498c94848e
https://git.kernel.org/stable/c/ff128fbea720bf763fa345680dda5f050bc24a47

---

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.