NULL pointer dereference in Linux kernel afs

1) NULL pointer dereference

EUVDB-ID: #VU104612

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-2022-49688

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 afs_getattr() function in fs/afs/inode.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/2b2bba96526f25f2eba74ecadb031de2e05a83ce
https://git.kernel.org/stable/c/65c24caf1b9f5b08397c6e805ec24ebc390c6e4d
https://git.kernel.org/stable/c/7844ceada44eca740d31beb3d97b8511b1ca0a9b
https://git.kernel.org/stable/c/7b564e3254b7db5fbfbf11a824627a6c31b932b4
https://git.kernel.org/stable/c/cb78d1b5efffe4cf97e16766329dd7358aed3deb
https://git.kernel.org/stable/c/e3a232e5767051483ffad4cef7d0a89d292a192b

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.