What is the CVSS score of CVE-2023-2898?

CVE-2023-2898 has a CVSS 3.1 base score of 4.7 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2023-2898?

Yes, a patch is available for CVE-2023-2898. Update the affected software to the latest version immediately.

Debian Linux CVE-2023-2898

MEDIUM

NULL Pointer Dereference (CWE-476)

2023-05-26 secalert@redhat.com

Denial Of Service Linux Null Pointer Dereference Debian Debian Linux H300s Firmware H410c Firmware H410s Firmware H500s Firmware H700s Firmware Netapp

4.7

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-476 OWASP Top 10:2025 A10:2025 - Mishandling of Exceptional Conditions ASVS 5.0 V16 - Security Logging and Error Handling Null pointer safety, defensive checks MITRE ATT&CK 1 technique across 1 tactic: Impact The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 4.7 (MEDIUM). Attack characteristics: local attack vector, high complexity, low privileges required, no user interaction not required.
Exploit ScenarioDerived	A local attacker with access to the system could crash the application by dereferencing a null pointer.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisAI

There is a null-pointer-dereference flaw found in f2fs_write_end_io in fs/f2fs/data.c in the Linux kernel. Rated medium severity (CVSS 4.7). This NULL Pointer Dereference vulnerability could allow attackers to crash the application by dereferencing a null pointer.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. There is a null-pointer-dereference flaw found in f2fs_write_end_io in fs/f2fs/data.c in the Linux kernel. This flaw allows a local privileged user to cause a denial of service problem. Affected products include: Linux Linux Kernel, Debian Debian Linux, Netapp H300S Firmware, Netapp H500S Firmware, Netapp H700S Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 4.7 MEDIUM

AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

There is a null-pointer-dereference flaw found in f2fs_write_end_io in fs/f2fs/data.c in the Linux kernel. This flaw allows a local privileged user to cause a denial of service problem.

Threat Intelligence Overview

EPSS Score

0.2%

Top 90% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +24

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Null Pointer Dereference MEDIUM

A null pointer dereference occurs when a program attempts to access memory through a pointer that has been set to NULL (address 0x0).

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*

cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://lore.kernel.org/linux-f2fs-devel/20230522124203.3838360-1-chao%40kernel.org/ REF https://cert-portal.siemens.com/productcert/html/ssa-794697.html REF https://cert-portal.siemens.com/productcert/html/ssa-831302.html REF https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html REF https://security.netapp.com/advisory/ntap-20230929-0002/ REF https://www.debian.org/security/2023/dsa-5480 REF https://www.debian.org/security/2023/dsa-5492

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