What’s Vulnerable › Vulnerabilities

CVE-2018-20349

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-12-22 · updated 2026-06-17
• Weakness: CWE-476

Description

The igraph_i_strdiff function in igraph_trie.c in igraph through 0.7.1 has an NULL pointer dereference that allows attackers to cause a denial of service (application crash) via a crafted object.

Affected products

• Igraph: through 0.7.1

References

• https://github.com/igraph/igraph/issues/1141
• https://lists.debian.org/debian-lts-announce/2019/12/msg00038.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NCGDUNQYLSZLSGN6JJBORVFW46U3A75Y/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OWCGXEINKJM3JQUPVCSN4RBTRKWBTYI7/
• https://github.com/igraph/igraph/issues/1141
• https://lists.debian.org/debian-lts-announce/2019/12/msg00038.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NCGDUNQYLSZLSGN6JJBORVFW46U3A75Y/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OWCGXEINKJM3JQUPVCSN4RBTRKWBTYI7/

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