TI-2020-16890 Aliases CVE-2020-27819 GHSA-fp3r-w9w2-jg2f

NULL pointer dereference in libxls

LOW 26CWE-476Published 2021-02-23 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.

Why it matters now

EPSS 0.00825 57th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	libxls	libxls before 1.6.2	—	No fix listed	CNA

libxls Vendor— Affected libxls before 1.6.2 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:libxls_project:libxls::::::::	before 1.6.2	Vulnerable	libxls

cpe:2.3:a:libxls_project:libxls:*:*:*:*:*:*:*:* Versions before 1.6.2 Vulnerable ·libxls

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2020-27819
2026-10-03 Alias added: GHSA-fp3r-w9w2-jg2f

References

Advisory 1

https://bugzilla.redhat.com/show_bug.cgi?id=1903296

TI-2026-21391 libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the… CVSS 3.1MEDIUM 6.5
TI-2023-20133 Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
TI-2023-20132 Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
TI-2023-20131 Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
TI-2023-20130 Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
TI-2023-20128 Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5

See all 19 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences