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Public proof of conceptFix available

CVE-2016-9401

A public proof of concept exists; no exploitation attested.

  • Published2017-01-23
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2017-01-2321:59CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-9401?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-9401?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Redhat enterprise linux server eus
BranchAffectedFixed in
7.4= 7.4no fix published
7.5= 7.5no fix published
7.6= 7.6no fix published
7.7= 7.7no fix published
Redhat enterprise linux server aus
BranchAffectedFixed in
7.4= 7.4no fix published
7.6= 7.6no fix published
7.7= 7.7no fix published
Gnu bash
BranchAffectedFixed in
4.4< 4.44.4
4.4= 4.4no fix published

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bashUbuntu:18.04:LTSall versions · fixed in 4.4-5ubuntu1
  • bashUbuntu:16.04:LTSall versions · fixed in 4.3-14ubuntu1.2
  • bashUbuntu:14.04:LTSall versions · fixed in 4.3-7ubuntu1.7
  • bashSUSE:Linux Enterprise Workstation Extension 12 SP2all versions · fixed in 4.3-82.1
  • bashSUSE:Linux Enterprise Software Development Kit 12 SP2all versions · fixed in 4.3-82.1
  • bashSUSE:Linux Enterprise Software Development Kit 11 SP4all versions · fixed in 3.2-147.35.1
  • bashSUSE:Linux Enterprise Server for SAP Applications 12 SP2all versions · fixed in 4.3-82.1
  • bashSUSE:Linux Enterprise Server for SAP Applications 11 SP4all versions · fixed in 3.2-147.35.1

22 more package ranges on OSV.dev

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published
2017-01-23
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-888p-vvcc-q364

Frequently asked questions

What is CVE-2016-9401?

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

Is CVE-2016-9401 actively exploited?

A proof-of-concept exploit exists for CVE-2016-9401, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2016-9401?

CVE-2016-9401 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record