Cyber Resilience

CVE-2023-0459

Linux Kernel ≤ 4.14.307

Published
25 May 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 6.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0063 47th percentile
Risk Priority 51 floored blend · peak EPSS

Summary

CVE-2023-0459 is a medium-severity Release of Invalid Pointer or Reference (CWE-763) vulnerability in Linux Linux Kernel. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 47th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

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…

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commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47

CWE(s)
CWE-763

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

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CVE-2026-52993Same product: Linux Linux Kernel
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Affected Assets

linux
linux kernel
≤ 4.14.307 · 4.19.0 — 4.19.274 · 5.4.0 — 5.4.233

Mitigating Controls

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent invalid pointer release errors during development.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect invalid pointer releases before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC practices can mandate proper memory-management APIs and reviews that catch incorrect deallocation.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify correct use of release functions and pointer validation.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles include safe memory handling and resource-lifetime rules.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly prohibit mismatched or incorrect pointer-release calls.

References