CVE-2016-9401: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.

Affected products

• Debian Debian Linux: version 8.0 only
• GNU Bash: before 4.4 (fixed in 4.4); version 4.4 only
• Red Hat Enterprise Linux Desktop: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server: version 6.0 only; version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.4 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Eus: version 7.4 only; version 7.5 only; version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Server Tus: version 7.6 only; version 7.7 only
• Red Hat Enterprise Linux Workstation: version 6.0 only; version 7.0 only

Published 2017-01-23. Last modified 2026-06-17.