What’s Vulnerable › Vulnerabilities

CVE-2018-20452

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-25 · updated 2026-06-17
• Weakness: CWE-119

Description

The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, because of inconsistent memory management (new versus free) in ole2_read_header in ole.c.

Affected products

• libxls: 1.4.0

References

• https://github.com/evanmiller/libxls/issues/35
• https://security.gentoo.org/glsa/202003-64
• https://github.com/evanmiller/libxls/issues/35
• https://security.gentoo.org/glsa/202003-64

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