Descriptionsmtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium
Debian Bugs978038

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
opensmtpd (PTS)stretch (security), stretch6.0.2p1-2+deb9u3fixed
buster, buster (security)6.0.3p1-5+deb10u4vulnerable
bullseye, sid6.8.0p2-3fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
opensmtpdsourcestretch(not affected)


[buster] - opensmtpd <no-dsa> (Minor issue)
[stretch] - opensmtpd <not-affected> (regex table supported added > 6.4.0 according to

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