Vulnerability identifier: #VU90870

Vulnerability risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-47297

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 caif_seqpkt_sendmsg() function in net/caif/caif_socket.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3
http://git.kernel.org/stable/c/5c6d8e2f7187b8e45a18c27acb7a3885f03ee3db
http://git.kernel.org/stable/c/ffe31dd70b70a40cd6b21b78c1713a23e021843a
http://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85
http://git.kernel.org/stable/c/9413c0abb57f70a953b1116318d6aa478013c35d
http://git.kernel.org/stable/c/1582a02fecffcee306663035a295e28e1c4aaaff
http://git.kernel.org/stable/c/d4c7797ab1517515f0d08b3bc1c6b48883889c54
http://git.kernel.org/stable/c/991e634360f2622a683b48dfe44fe6d9cb765a09

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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.