What is the CVSS score of CVE-2023-49555?

CVE-2023-49555 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.3%.

Which versions of Yasm are affected by CVE-2023-49555?

CVE-2023-49555 presents moderate security risk, a resource exhaustion vulnerability rated CVSS 5.5. Service availability could be impacted. Proof-of-concept code is publicly available.

Is there a public PoC exploit available for CVE-2023-49555?

Yes, a public proof-of-concept exploit is available for CVE-2023-49555. Prioritise patching immediately. EPSS: 0.3%.

How to fix or mitigate CVE-2023-49555?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Yasm CVE-2023-49555

MEDIUM

Uncontrolled Resource Consumption (CWE-400)

2024-01-03 cve@mitre.org

Denial Of Service Yasm

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:33 vuln.today

PoC Detected

Jun 17, 2025 - 16:15 vuln.today

Public exploit code

CVE Published

Jan 03, 2024 - 00:15 nvd

MEDIUM 5.5

DescriptionCVE.org

An issue in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expand_smacro function in the modules/preprocs/nasm/nasm-pp.c component.

AnalysisAI

An issue in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expand_smacro function in the modules/preprocs/nasm/nasm-pp.c component. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. An issue in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expand_smacro function in the modules/preprocs/nasm/nasm-pp.c component. Affected products include: Yasm Project Yasm.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.