#VU106140 Memory leak in Linux kernel - CVE-2023-53008

Vulnerability identifier: #VU106140

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-2023-53008

CWE-ID: CWE-401

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 memory leak within the SMB2_auth_kerberos() function in fs/cifs/smb2pdu.c, within the decode_ntlmssp_challenge() and sess_auth_kerberos() functions in fs/cifs/sess.c, within the build_avpair_blob() function in fs/cifs/cifsencrypt.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1, 6.1 rc1, 6.1 rc3, 6.1 rc7, 6.1.1, 6.1.2, 6.1.3, 6.1.4, 6.1.5, 6.1.6, 6.1.7, 6.1.8

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External links
https://git.kernel.org/stable/c/2fe58d977ee05da5bb89ef5dc4f5bf2dc15db46f
https://git.kernel.org/stable/c/893d45394dbe4b5cbf3723c19e2ccc8b93a6ac9b
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.9

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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.