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TI-2016-07673 Aliases CVE-2016-9401GHSA-888p-vvcc-q364

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

Priority MEDIUM 61CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

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

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00421 36th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 22

CPEVersionsRoleVendor
cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*before 4.4VulnerableGNU
cpe:2.3:a:gnu:bash:4.4:patch1:*:*:*:*:*:*4.4 patch1VulnerableGNU
cpe:2.3:a:gnu:bash:4.4:patch2:*:*:*:*:*:*4.4 patch2VulnerableGNU
cpe:2.3:a:gnu:bash:4.4:patch3:*:*:*:*:*:*4.4 patch3VulnerableGNU
cpe:2.3:a:gnu:bash:4.4:patch4:*:*:*:*:*:*4.4 patch4VulnerableGNU
cpe:2.3:a:gnu:bash:4.4:patch5:*:*:*:*:*:*4.4 patch5VulnerableGNU
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
  • cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:* Versions before 4.4 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:4.4:patch1:*:*:*:*:*:* Versions 4.4 patch1 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:4.4:patch2:*:*:*:*:*:* Versions 4.4 patch2 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:4.4:patch3:*:*:*:*:*:* Versions 4.4 patch3 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:4.4:patch4:*:*:*:*:*:* Versions 4.4 patch4 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:4.4:patch5:*:*:*:*:*:* Versions 4.4 patch5 Vulnerable ·GNU
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
Show 12 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*7.4VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*7.5VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*7.6VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:*7.7VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_aus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:* Versions 7.4 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_eus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* Versions 7.6 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server_tus:7.7:*:*:*:*:*:*:* Versions 7.7 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2017:1931 Released 2017-08-01 · Red Hat rating Moderate
    bash security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) bash-4.2.46-28.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) bash-doc-4.2.46-28.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) bash-4.2.46-28.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) bash-doc-4.2.46-28.el7
    • Red Hat Enterprise Linux Server (v. 7) bash-4.2.46-28.el7
    • Red Hat Enterprise Linux Server Optional (v. 7) bash-doc-4.2.46-28.el7
    • Red Hat Enterprise Linux Workstation (v. 7) bash-4.2.46-28.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) bash-doc-4.2.46-28.el7
  • RHSA-2017:0725 Released 2017-03-21 · Red Hat rating Moderate
    bash security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) bash-4.1.2-48.el6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) bash-doc-4.1.2-48.el6
    • Red Hat Enterprise Linux HPC Node (v. 6) bash-4.1.2-48.el6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) bash-doc-4.1.2-48.el6
    • Red Hat Enterprise Linux Server (v. 6) bash-4.1.2-48.el6
    • Red Hat Enterprise Linux Server Optional (v. 6) bash-doc-4.1.2-48.el6
    • Red Hat Enterprise Linux Workstation (v. 6) bash-4.1.2-48.el6
    • Red Hat Enterprise Linux Workstation Optional (v. 6) bash-doc-4.1.2-48.el6

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:1931
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2017:0725
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:1931

Timeline

  1. 2026-10-02 Threatist record created from CVE-2016-9401
  2. 2026-10-03 Alias added: GHSA-888p-vvcc-q364

References

Advisory 6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences