#VU94138 Input validation error in Linux kernel - CVE-2023-52636

Vulnerability identifier: #VU94138

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-2023-52636

CWE-ID: CWE-20

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 improper input validation within the get_reply() and prep_next_sparse_read() functions in net/ceph/osd_client.c, within the decrypt_tail() and prepare_read_tail_plain() functions in net/ceph/messenger_v2.c, within the sizeof_footer(), read_partial_sparse_msg_data() and read_partial_message() functions in net/ceph/messenger_v1.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/da9c33a70f095d5d55c36d0bfeba969e31de08ae
https://git.kernel.org/stable/c/bd9442e553ab8bf74b8be3b3c0a43bf4af4dc9b8
https://git.kernel.org/stable/c/8e46a2d068c92a905d01cbb018b00d66991585ab

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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.