CVE-2023-49554 — yasm: remote attacker cause a denial of service via the do_directive function

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MEDIUM

yasm: remote attacker cause a denial of service via the do_directive function

Published Jan 2, 2024

5.5

MEDIUM

CVSS 3.1

EPSS 0.40%

Description

Use After Free vulnerability in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the do_directive function in the modules/preprocs/nasm/nasm-pp.c component.

Affected products

Remediation

Red Hat statement

Red Hat Product Security does not consider this to be a vulnerability.

Metrics

0.40% 0.00398

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.00398

Score over time

2024–2026

EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v3
EPSS v4
EPSS v5

Table of values (6 key points)

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

Date	Score	Percentile	Model
Oct 3, 2026	0.40% (0.00398)	31.64th	v5 (v2026.06.15)
Jun 15, 2026	0.40% (0.00398)	31.31th	v5 (v2026.06.15)
Mar 17, 2025	0.09% (0.00091)	23.64th	v4 (v2025.03.14)
Dec 12, 2024	0.07% (0.00067)	31.41th	v3 (v2023.03.01)
Jul 10, 2024	0.07% (0.00067)	29.65th	v3 (v2023.03.01)
Jan 10, 2024	0.07% (0.00067)	27.63th	v3 (v2023.03.01)

Weaknesses (2)

CWE-400

Uncontrolled Resource Consumption

CWE-416

Use After Free

References (5)

https://access.redhat.com/security/cve/CVE-2023-49554
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2256611
Issue Tracking
https://github.com/yasm/yasm/issues/249
ExploitIssue TrackingVendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-49554
https://www.cve.org/CVERecord?id=CVE-2023-49554

Link	Providers	Tags
https://access.redhat.com/security/cve/CVE-2023-49554		Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2256611		Issue Tracking
https://github.com/yasm/yasm/issues/249		ExploitIssue TrackingVendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2023-49554
https://www.cve.org/CVERecord?id=CVE-2023-49554