In exec.c in zsh before 5.0.7, there is a buffer overflow for very long fds in the ">& fd" syntax.
https://usn.ubuntu.com/3593-1/
https://sourceforge.net/p/zsh/code/ci/49a3086bb67575435251c70ee598e2fd406ef055
https://access.redhat.com/errata/RHSA-2018:3073
Source: Mitre, NVD
Published: 2018-02-27
Updated: 2019-06-11
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical