CVE-2019-18276: An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11

This month

HIGH 7.8UPGRADEMITIGATEDOWNGRADE

CVE-2019-18276 is a high-severity flaw (CVSS 7.8) affecting bash, hci management node, oncommand unified manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 loa

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-273
Published	2019-11-28
Last modified	2026-10-14

Publisher (CNA): MITRE · Vendor: gnu · netapp · oracle

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-11-28 01:15 UTCPublished CVE record published
2026-10-14 07:16 UTCUpdated Record last modified

gnu bash UPGRADE

Affected: <= 5.0 · 5.0 beta1 · 5.0 beta2 · 5.0 patch1 · 5.0 patch10 · 5.0 patch11 · 5.0 patch2 · 5.0 patch3

Fixed in: newer than 5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bash || rpm -q bash || bash --version

2. UPGRADE to newer than 5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bash

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bash

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

netapp hci management node MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hci-management-node || rpm -q hci-management-node || hci-management-node --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

netapp oncommand unified manager DOWNGRADE

Affected: >= 9.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.5

1. Check installed version

apt-cache policy oncommand-unified-manager || rpm -q oncommand-unified-manager || oncommand-unified-manager --version

2. No fixed release: DOWNGRADE to a release before 9.5 (Debian / Ubuntu)

apt-cache madison oncommand-unified-manager sudo apt install oncommand-unified-manager=<VERSION_BEFORE_9.5> sudo apt-mark hold oncommand-unified-manager

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list oncommand-unified-manager sudo dnf downgrade oncommand-unified-manager-<VERSION_BEFORE_9.5> sudo dnf versionlock add oncommand-unified-manager

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

netapp solidfire MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy solidfire || rpm -q solidfire || solidfire --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

oracle communications cloud native core policy DOWNGRADE

Affected: 1.14.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.14.0

1. Check installed version

apt-cache policy communications-cloud-native-core-policy || rpm -q communications-cloud-native-core-policy || communications-cloud-native-core-policy --version

2. No fixed release: DOWNGRADE to a release before 1.14.0 (Debian / Ubuntu)

apt-cache madison communications-cloud-native-core-policy sudo apt install communications-cloud-native-core-policy=<VERSION_BEFORE_1.14.0> sudo apt-mark hold communications-cloud-native-core-policy

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list communications-cloud-native-core-policy sudo dnf downgrade communications-cloud-native-core-policy-<VERSION_BEFORE_1.14.0> sudo dnf versionlock add communications-cloud-native-core-policy

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-18276?

bash: upgrade to newer than 5.0; hci management node: mitigate or apply the listed mitigation; oncommand unified manager: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-18276 being exploited?

CVE-2019-18276 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-18276 affect?

CVE-2019-18276 affects bash, hci management node, oncommand unified manager. Severity is high (CVSS 7.8). 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. How

How urgent is CVE-2019-18276?

Priority 54/100. High severity; Public exploit reference

Related CVEs

CVE-2022-3715 HIGH 7.8 UPGRADE MITIGATE A flaw was found in the bash package, where a heap-buffer overflow can occur in valid parameter_transform
CVE-2019-9924 HIGH 7.8 UPGRADE MITIGATE rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus allowing the user
CVE-2017-5932 HIGH 7.8 MITIGATE The path autocompletion feature in Bash 4.4 allows local users to gain privileges via a crafted filename start
CVE-2016-9401 MEDIUM 5.5 UPGRADE MITIGATE popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted a
CVE-2016-7543 HIGH 8.4 UPGRADE MITIGATE Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS an

References

← Back to latest CVEs