#VU76222 Processor optimization removal or modification of security-critical code in Linux kernel - CVE-2023-0459

Vulnerability identifier: #VU76222

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-0459

CWE-ID: CWE-1037

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 sensitive information.

The vulnerability exists due to improper implementation of speculative execution barriers in usercopy functions
in certain situations. A local user can gain access to sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 6.1.8, 6.1.8

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External links
https://github.com/google/security-research/security/advisories/GHSA-m7j5-797w-vmrh
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=74e19ef0ff8061ef55957c3abd71614ef0f42f47

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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.