CVE-2018-20455 — In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash via a stack-based buffer overflow) by crafting an input file, a related issue to CVE-2018-20456

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MEDIUM

In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash via a stack-based buffer overflow) by crafting an input file, a related issue to CVE-2018-20456

Published Dec 25, 2018

5.5

MEDIUM

CVSS 3.0

EPSS 1.05%

Description

In radare2 prior to 3.1.1, the parseOperand function inside libr/asm/p/asm_x86_nz.c may allow attackers to cause a denial of service (application crash via a stack-based buffer overflow) by crafting an input file, a related issue to CVE-2018-20456.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.05% 0.01054

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01054

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (11 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.05% (0.01054)	63.13th	v5 (v2026.06.15)
Sep 20, 2026	1.05% (0.01054)	62.90th	v5 (v2026.06.15)
Jul 20, 2024	0.08% (0.00077)	33.65th	v3 (v2023.03.01)
Apr 25, 2024	0.08% (0.00077)	32.23th	v3 (v2023.03.01)
Mar 15, 2024	0.06% (0.00055)	20.51th	v3 (v2023.03.01)
Feb 8, 2024	0.05% (0.00050)	15.76th	v3 (v2023.03.01)
Mar 7, 2023	0.08% (0.00082)	33.29th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)
Feb 3, 2022	0.78% (0.00777)	21.50th	v5 (v2026.06.15)
Apr 14, 2021	0.78% (0.00777)	0.00th	v1

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (2)

https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185
x_refsource_MISCPatchThird Party Advisory
https://github.com/radare/radare2/issues/12373
x_refsource_MISCExploitThird Party Advisory

Link	Providers	Tags
https://github.com/radare/radare2/commit/9b46d38dd3c4de6048a488b655c7319f845af185		x_refsource_MISCPatchThird Party Advisory
https://github.com/radare/radare2/issues/12373		x_refsource_MISCExploitThird Party Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Dec 25, 2018

Updated Sep 16, 2024

Reserved Dec 25, 2018

Link CVE-2018-20455

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-20455

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-20455