CVE-2018-18585: Canonical Ubuntu Linux

Medium severity, CVSS 4.3. EPSS: 3.1% chance of exploitation in the next 30 days.

chmd_read_headers in mspack/chmd.c in libmspack before 0.8alpha accepts a filename that has '\0' as its first or second character (such as the "/\0" name).

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only
• Kyzer Libmspack: version 0.3 only; version 0.4 only; version 0.5 only; version 0.6 only; version 0.7 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Starwindsoftware Starwind Virtual San: affected versions not specified
• Suse Linux Enterprise Server: version 11 only; version 12 only

Published 2018-10-23. Last modified 2026-06-17.