vulnerability
Red Hat: CVE-2023-0459: Copy_from_user on 64-bit versions may leak kernel information (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:M/C:C/I:C/A:C) | May 25, 2023 | Oct 10, 2023 | Mar 27, 2026 |
Severity
7
CVSS
(AV:L/AC:L/Au:M/C:C/I:C/A:C)
Published
May 25, 2023
Added
Oct 10, 2023
Modified
Mar 27, 2026
Description
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
Solutions
redhat-upgrade-kernelredhat-upgrade-kernel-rt
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.