#VU104772 Use of uninitialized resource in Linux kernel - CVE-2022-49418

Vulnerability identifier: #VU104772

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-2022-49418

CWE-ID: CWE-908

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 use of uninitialized resource within the nfs4_xdr_dec_fs_locations() function in fs/nfs/nfs4xdr.c, within the nfs4_try_migration() function in fs/nfs/nfs4state.c, within the nfs4_get_referral(), _nfs4_proc_fs_locations(), _nfs40_proc_get_locations() and _nfs41_proc_get_locations() functions in fs/nfs/nfs4proc.c, within the nfs_do_refmount() function in fs/nfs/nfs4namespace.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/6015292653d95ba9f72906e2b65e536aa5807d64
https://git.kernel.org/stable/c/c3ed222745d9ad7b69299b349a64ba533c64a34f
https://git.kernel.org/stable/c/eb1fe9600b86c24a789046bfc5c6851dda119280

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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.