#VU90065 Use-after-free in Linux kernel - CVE-2023-52741

Vulnerability identifier: #VU90065

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52741

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the uncached_fill_pages() and readpages_fill_pages() functions in fs/cifs/file.c. A local user can escalate privileges on the system.

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/2b693fe3f760c87fd9768e759f6297f743a1b3b0
https://git.kernel.org/stable/c/d1fba1e096ffc7ec11df863a97c50203c47315b9
https://git.kernel.org/stable/c/3684a2f6affa1ca52a5d4a12f04d0652efdee65e
https://git.kernel.org/stable/c/aa5465aeca3c66fecdf7efcf554aed79b4c4b211

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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.