Gentoo Linux Security Advisory GLSA 200606-27 – TAKAHASHI Tamotsu has discovered that Mutt contains a boundary error in the browse_get_namespace() function in browse.c, which can be triggered when receiving an overly long namespace from an IMAP server. Versions less than 1.5.11-r2 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/47859/glsa-200606-27.txt
Source: https://packetstormsecurity.com/files/47859/Gentoo-Linux-Security-Advisory-200606-27.html