CVE-2018-20450 — The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897

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MEDIUM

The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897

Published Dec 25, 2018

6.5

MEDIUM

CVSS 3.0

EPSS 1.06%

Description

The read_MSAT function in ole.c in libxls 1.4.0 has a double free that allows attackers to cause a denial of service (application crash) via a crafted file, a different vulnerability than CVE-2017-2897.

Affected products

Remediation

No remediation recorded yet.

Metrics

1.06% 0.01064

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.

EPSS probability 0.01064

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 (9 key points)

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

Date	Score	Percentile	Model
Oct 2, 2026	1.06% (0.01064)	63.46th	v5 (v2026.06.15)
Sep 20, 2026	1.06% (0.01064)	63.19th	v5 (v2026.06.15)
Jul 20, 2024	0.09% (0.00091)	39.16th	v3 (v2023.03.01)
Jul 17, 2024	0.09% (0.00091)	39.18th	v3 (v2023.03.01)
Mar 7, 2023	0.09% (0.00091)	37.14th	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-415

References (2)

https://github.com/evanmiller/libxls/issues/34
x_refsource_MISCExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202003-64
vendor-advisoryx_refsource_GENTOO

Link	Providers	Tags
https://github.com/evanmiller/libxls/issues/34		x_refsource_MISCExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202003-64		vendor-advisoryx_refsource_GENTOO

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner mitre

Published Dec 25, 2018

Updated Aug 5, 2024

Reserved Dec 25, 2018

Link CVE-2018-20450

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2018-20450

Red Hat

Severity n/a

Public date n/a

Links CVE-2018-20450