Cyber Resilience

CVE-2023-28327

Memory Safety in Redhat Enterprise Linux 8.0 … 9.0

Memory Safety
Published
19 April 2023
Modified
19 March 2025
Patch / advisory
View advisory
CVSS Score v3.1 5.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0019 9th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2023-28327 is a medium-severity NULL Pointer Dereference (CWE-476) vulnerability in Redhat Enterprise Linux. Its CVSS base score is 5.5 (Medium).

Operationally, ranked at the 9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A10:2025 Mishandling of Exceptional Conditions

EU & UK References

Vulnerability Data

A NULL pointer dereference flaw was found in the UNIX protocol in net/unix/diag.c In unix_diag_get_exact in the Linux Kernel. The newly allocated skb does not have sk, leading to a NULL pointer. This flaw allows a local user to crash…

more

or potentially cause a denial of service.

CWE(s)
CWE-476

Related Threats

CVEs Like This One

CVE-2024-0841Same product: Linux Linux Kernel
CVE-2023-6176Same product: Linux Linux Kernel
CVE-2023-6915Same product: Linux Linux Kernel
CVE-2023-28328Same product: Linux Linux Kernel
CVE-2023-1095Same product: Linux Linux Kernel
CVE-2023-4459Same product: Linux Linux Kernel
CVE-2023-4010Same product: Linux Linux Kernel
CVE-2024-0775Same product: Linux Linux Kernel
CVE-2023-3812Same product: Linux Linux Kernel
CVE-2023-3640Same product: Linux Linux Kernel

Affected Assets

linux
linux kernel
≤ 6.0
redhat
enterprise linux
8.0, 9.0

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 (static analysis, code review, safe coding standards) directly prevent NULL dereference bugs 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
detects

Security testing can detect NULL dereference defects before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates defensive coding practices that can prevent NULL dereferences.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input validation and pointer-safety rules.

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

Secure architecture principles encourage defensive design that avoids unsafe pointer use.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly require NULL-pointer checks and safe dereference patterns.

References