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CVE-2023-0459

Good to know:

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Date: May 25, 2023

Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the "access_ok" check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47

Language: C

Severity Score

Related Resources (8)

https://access.redhat.com/security/cve/CVE-2023-0459
https://github.com/torvalds/linux/commit/74e19ef0ff8061ef55957c3abd71614ef0f42f47
https://github.com/torvalds/linux/commit/4b842e4e25b12951fa10dedb4bc16bc47e3b850c
https://github.com/google/security-research/security/advisories/GHSA-m7j5-797w-vmrh
https://nvd.nist.gov/vuln/detail/CVE-2023-0459
https://people.canonical.com/~ubuntu-security/cve/CVE-2023-0459
https://github.com/gregkh/linux/commit/74e19ef0ff8061ef55957c3abd71614ef0f42f47
https://www.mend.io/vulnerability-database/CVE-2023-0459

Severity Score

Weakness Type (CWE)

Release of Invalid Pointer or Reference

CWE-763

Top Fix

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Upgrade Version

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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