NULL pointer dereference in Linux kernel sunrpc xprtrdma

1) NULL pointer dereference

EUVDB-ID: #VU104558

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-2022-49321

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 rpcrdma_is_bcall() function in net/sunrpc/xprtrdma/rpc_rdma.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/11270e7ca268e8d61b5d9e5c3a54bd1550642c9c
https://git.kernel.org/stable/c/8dbae5affbdbf524b48000f9d357925bb001e5f4
https://git.kernel.org/stable/c/8e3943c50764dc7c5f25911970c3ff062ec1f18c
https://git.kernel.org/stable/c/90c4f73104016748533a5707ecd15930fbeff402
https://git.kernel.org/stable/c/91784f3d77b73885e1b2e6b59d3cbf0de0a1126a
https://git.kernel.org/stable/c/998d35a2aff4b81a1c784f3aa45cd3afff6814c1
https://git.kernel.org/stable/c/a3fc8051ee061e31db13e2fe011e8e0b71a7f815
https://git.kernel.org/stable/c/da99331fa62131a38a0947a8204c5208de7b0454

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.