Cyber Resilience

CVE-2023-40218

Memory Safety in Samsung Exynos 9820 Firmware

Memory Safety
Published
12 September 2023
Modified
21 November 2024
Patch / advisory
View advisory
CVSS Score v3.1 2.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
EPSS Score 0.0018 7th percentile
Risk Priority 15 floored blend · peak EPSS

Summary

CVE-2023-40218 is a low-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Samsung Exynos 9820 Firmware. Its CVSS base score is 2.0 (Low).

Operationally, ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability Data

An issue was discovered in the NPU kernel driver in Samsung Exynos Mobile Processor 9820, 980, 2100, 2200, 1280, and 1380. An integer overflow can bypass detection of error cases via a crafted application.

CWE(s)
CWE-190

Related Threats

CVEs Like This One

CVE-2023-45864Same product: Samsung Exynos 1280
CVE-2023-42483Same product: Samsung Exynos 1280
CVE-2023-40353Same product: Samsung Exynos 2100
CVE-2023-28613Same product: Samsung Exynos 1280
CVE-2025-23098Same product: Samsung Exynos 1280
CVE-2024-27361Same product: Samsung Exynos 1280
CVE-2026-41666Same vendor: Samsung
CVE-2023-42562Same vendor: Samsung
CVE-2026-40450Same vendor: Samsung
CVE-2023-42563Same vendor: Samsung

Affected Assets

samsung
exynos 9820 firmware
all versions
samsung
exynos 980 firmware
all versions
samsung
exynos 2100 firmware
all versions
samsung
exynos 2200 firmware
all versions
samsung
exynos 1280 firmware
all versions
samsung
exynos 1380 firmware
all versions

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.6

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 require use of safe arithmetic, bounds checks, and testing that prevent integer overflows.

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 in development can detect integer overflows before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and arithmetic checks that prevent integer overflows.

A.8.26 Application security requirements partial match
degrades

Application security requirements include bounds checking and safe arithmetic to avoid overflow conditions.

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

Secure architecture principles require defensive coding patterns that mitigate integer wraparound risks.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe integer operations and mandate overflow-safe constructs.

References