CVE-2019-18276· NVD / CVE Program· CNA mitre

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11.

Noroxi assessment

Priority: Monitor (action score 32/100)

Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 2.6% (FIRST EPSS); higher than 85% of all records.
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: bash (Debian:12) 5.1~rc1-2; bash (Red Hat:enterprise_linux:8::baseos) 0:4.4.19-14.el8; bash-debuginfo (Red Hat:enterprise_linux:8::baseos) 0:4.4.19-14.el8.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to bash (Debian:12) 5.1~rc1-2; bash (Red Hat:enterprise_linux:8::baseos) 0:4.4.19-14.el8; bash-debuginfo (Red Hat:enterprise_linux:8::baseos) 0:4.4.19-14.el8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.

HighCVSS 7.8 · v3.1—Proof of concept Fix available

Published: Nov 28, 2019
Updated: Oct 14, 2026
EPSS: 2.6% · 85th percentile
CWE: CWE-273

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 1 / 30 · 2.6%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.8
CNA · mitre: 7.8; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
gnu	bash	cpe:2.3:a:gnu:bash
netapp	hci management node	cpe:2.3:a:netapp:hci_management_node
netapp	oncommand unified manager	cpe:2.3:a:netapp:oncommand_unified_manager
netapp	solidfire	cpe:2.3:a:netapp:solidfire
oracle	communications cloud native core policy	cpe:2.3:a:oracle:communications_cloud_native_core_policy

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

gnu bashup to 5.0 inclusive
gnu bash5.0
netapp hci management nodeall versions
netapp oncommand unified manager9.5 and later
netapp solidfireall versions
oracle communications cloud native core policy1.14.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	bash	before 5.1~rc1-2	5.1~rc1-2
Red Hat:enterprise_linux:8::baseos	bash	before 0:4.4.19-14.el8	0:4.4.19-14.el8
Red Hat:enterprise_linux:8::baseos	bash-debuginfo	before 0:4.4.19-14.el8	0:4.4.19-14.el8
Red Hat:enterprise_linux:8::baseos	bash-debugsource	before 0:4.4.19-14.el8	0:4.4.19-14.el8
Red Hat:enterprise_linux:8::baseos	bash-doc	before 0:4.4.19-14.el8	0:4.4.19-14.el8

Same product

gnu: all records

Other highest-scoring records for the same primary product.

CVE-2014-7169GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variablKEV
99Now
CVE-2014-6271GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attacKEV
99Now
CVE-2014-6278GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attKEV
95Now
CVE-2014-7186The redirection implementation in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of service (out-of-bo
59Plan
CVE-2014-6277GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote att
59Plan
CVE-2014-7187Off-by-one error in the read_token_word function in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of
58Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:bash	5.1~rc1-2 · Debian:12	Package registry (OSV)
red hat:bash	0:4.4.19-14.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:bash-debuginfo	0:4.4.19-14.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:bash-debugsource	0:4.4.19-14.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)
red hat:bash-doc	0:4.4.19-14.el8 · Red Hat:enterprise_linux:8::baseos	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:3	2021-12-09
Proof-of-concept repository on GitHub	stars:0	2022-01-12

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedNov 28, 2019
First PoCDec 9, 2021+742 d
TodayOct 15, 2026+2514 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

bminor/bashcommit 951bdaa

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-21-0772 · Sep 23, 2021(RedHat Güvenlik Zafiyeti)

All national notices →

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-273 · Improper Check for Dropped Privileges

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records