bash: popd controlled free
Published Jan 23, 2017
6.2
MEDIUMCVSS 3.1
EPSS 0.43%
Description
popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.
Affected products
No data.
Configuration 1
Configuration 2
- 8.0
Configuration 3
- 6.0
- 7.0
- 6.0
- 7.0
- 7.4
- 7.6
- 7.7
- 7.4
- 7.5
- 7.6
- 7.7
- 7.6
- 7.7
- 6.0
- 7.0
No data.
Red Hat Enterprise Linux 6
bash-0:4.1.2-48.el6
Fixed · RHSA-2017:0725
Red Hat Enterprise Linux 7
bash-0:4.2.46-28.el7
Fixed · RHSA-2017:1931
Red Hat Enterprise Linux 5
bash
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | bash-0:4.1.2-48.el6 | Fixed | RHSA-2017:0725 |
| Red Hat Enterprise Linux 7 | bash-0:4.2.46-28.el7 | Fixed | RHSA-2017:1931 |
| Red Hat Enterprise Linux 5 | bash | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1 other source (CISA ADP) ▾
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
AV:L/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Aug 6, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.43% (0.00425) | 34.43th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.43% (0.00425) | 33.71th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.01% (0.00015) | 1.55th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (11)
- http://rhn.redhat.com/errata/RHSA-2017-0725.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/11/17/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/11/17/9 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/94398 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:1931 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-9401 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1396383 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2019/03/msg00028.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-9401
- https://security.gentoo.org/glsa/201701-02 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9401
Change history (0)
No recorded changes yet.