#VU87592 Information disclosure in Linux kernel - CVE-2023-52436

Vulnerability identifier: #VU87592

Vulnerability risk: Low

CVSSv4.0: 0.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52436

CWE-ID: CWE-200

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 gain access to potentially sensitive information.

The vulnerability exists due to the __f2fs_setxattr() function in fs/f2fs/xattr.c, does not empty by default the unused space in the xattr list. A local user can gain access to potentially sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/16ae3132ff7746894894927c1892493693b89135
https://git.kernel.org/stable/c/12cf91e23b126718a96b914f949f2cdfeadc7b2a
https://git.kernel.org/stable/c/3e47740091b05ac8d7836a33afd8646b6863ca52
https://git.kernel.org/stable/c/32a6cfc67675ee96fe107aeed5af9776fec63f11
https://git.kernel.org/stable/c/5de9e9dd1828db9b8b962f7ca42548bd596deb8a
https://git.kernel.org/stable/c/2525d1ba225b5c167162fa344013c408e8b4de36
https://git.kernel.org/stable/c/f6c30bfe5a49bc38cae985083a11016800708fea
https://git.kernel.org/stable/c/e26b6d39270f5eab0087453d9b544189a38c8564

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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.