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CVE-2019-12439

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point....

7.4 HighFix available

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.57%Down 1.2 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.4

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
CVE-2019-12439
CVSS 3.0
7.4 HighCVSS:3.0/AC:H/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:N
Updated
2026-11-02
EUVDEUVD-2019-4048 7.4

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
EUVD-2019-4048
CVSS 3.0
7.4 HighCVSS:3.0/AC:H/AV:L/A:H/C:H/I:H/PR:N/S:U/UI:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-hj8h-43q8-g8vp 7.8

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point....

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
GHSA-hj8h-43q8-g8vp
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-20
Updated
2026-11-02
NVD 7.4

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
CVE-2019-12439
CVSS 3.0
7.4 HighCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-20
Updated
2026-11-02
OSV 7.8

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
CVE-2019-12439
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-04
OSVDEBIAN-CVE-2019-12439 7.8

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
DEBIAN-CVE-2019-12439
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
Show 8 moreShow less
OSVRHSA-2019:1833 4.7

Red Hat Security Advisory: CloudForms 4.7.7 security, bug fix and enhancement update

Record
RHSA-2019:1833
CVSS 3.0
4.7 MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2019-12439 7.4

bubblewrap.c in Bubblewrap before 0.3.3 misuses temporary directories in /tmp as a mount point. In some particular configurations (related to XDG_RUNTIME_DIR), a local attacker may abuse this flaw to prevent other users from executing bubblewrap or potentially execute code.

Record
UBUNTU-CVE-2019-12439
CVSS 3.0
7.4 HighCVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0
7.8 HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVCLSA-2026-1789985660 No score

Fix CVE(s): CVE-2019-12439

  • SECURITY UPDATE: DoS / symlink attack via the attacker-precreatable pivot_root mount point
    • debian/patches/CVE-2019-12439.patch: mount the root tmpfs on /tmp itself in main() (bubblewrap.c) instead of creating /run/user/$UID/.bubblewrap or /tmp/.bubblewrap-$UID, which another local user can pre-create as a non-directory or as a symlink they control
    • debian/patches/CVE-2019-12439-test.patch: upstream regression test for the above, asserting the pivot_root scaffolding (/tmp/oldroot, /tmp/newroot) stays invisible inside the container (tests/test-run.sh)
    • CVE-2019-12439
Record
CLSA-2026-1789985660
Updated
2026-11-02
OSVopenSUSE-SU-2019:1535-1 No score

Security update for bubblewrap

This update for bubblewrap to version 0.3.3 fixes the following issue:

Security issue fixed:

  • CVE-2019-12439: Fixed a temporary directory misuse as mount point which could have allowed local user to prevent others from running bubblewrap.
Record
openSUSE-SU-2019:1535-1
Updated
2026-11-02
OSVopenSUSE-SU-2019:1721-1 No score

Security update for bubblewrap

This update for bubblewrap fixes the following issues:

Security issue fixed:

  • CVE-2019-12439: Fixed insecure use of /tmp (bsc#1136958).

This update was imported from the SUSE:SLE-15:Update update project.

Record
openSUSE-SU-2019:1721-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10663-1 No score

bubblewrap-0.5.0-1.1 on GA media

These are all security issues fixed in the bubblewrap-0.5.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10663-1
Updated
2026-11-02
OSVSUSE-SU-2019:1826-1 No score

Security update for bubblewrap

This update for bubblewrap fixes the following issues:

Security issue fixed:

  • CVE-2019-12439: Fixed insecure use of /tmp (bsc#1136958).
Record
SUSE-SU-2019:1826-1
Updated
2026-11-02
OSVUSN-8779-1 No score

bubblewrap vulnerabilities

It was discovered that Bubblewrap incorrectly handled certain temporary directories. A local attacker could possibly use this issue to cause a denial of service or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-12439)

It was discovered that Bubblewrap incorrectly handled certain symlinks during sandbox setup. A local attacker could possibly use this issue to create files outside of the sandbox. (CVE-2026-87766)

Record
USN-8779-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
bubblewrap
TuxCare:Ubuntu:18.04
 before 0.2.1-1ubuntu0.1+tuxcare.els1
0.2.1-1ubuntu0.1+tuxcare.els1
bubblewrap
Debian:12
 before 0.3.1-3
0.3.1-3
bubblewrap
Debian:13
 before 0.3.1-3
0.3.1-3
bubblewrap
Debian:14
 before 0.3.1-3
0.3.1-3
ansible-runner
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:1.3.4-2.el7ar
0:1.3.4-2.el7ar
ansible-tower
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:3.5.0-1.el7at
0:3.5.0-1.el7at
ansible-tower-server
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:3.5.0-1.el7at
0:3.5.0-1.el7at
ansible-tower-setup
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:3.5.0-1.el7at
0:3.5.0-1.el7at
ansible-tower-ui
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:3.5.0-1.el7at
0:3.5.0-1.el7at
ansible-tower-venv-ansible
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:3.5.0-1.el7at
0:3.5.0-1.el7at
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Affected packages
PackageAffectedFixed
ansible-tower-venv-tower
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:3.5.0-1.el7at
0:3.5.0-1.el7at
bubblewrap
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:0.3.3-2.el7at
0:0.3.3-2.el7at
bubblewrap-debuginfo
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:0.3.3-2.el7at
0:0.3.3-2.el7at
cfme
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-amazon-smartstate
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-appliance
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-appliance-common
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-appliance-debuginfo
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-appliance-tools
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-debuginfo
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-gemset
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
cfme-gemset-debuginfo
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:5.10.7.1-1.el7cf
0:5.10.7.1-1.el7cf
ovirt-ansible-hosted-engine-setup
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:1.0.20-1.el7ev
0:1.0.20-1.el7ev
ovirt-ansible-image-template
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:1.1.11-1.el7ev
0:1.1.11-1.el7ev
ovirt-ansible-manageiq
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:1.1.14-1.el7ev
0:1.1.14-1.el7ev
ovirt-ansible-vm-infra
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:1.1.18-1.el7ev
0:1.1.18-1.el7ev
python2-ansible-runner
Red Hat:cloudforms_managementengine:5.10::el7
 before 0:1.3.4-2.el7ar
0:1.3.4-2.el7ar
bubblewrap
SUSE:Linux Enterprise Module for Desktop Applications 15
 before 0.2.0-3.3.1
0.2.0-3.3.1
bubblewrap
Ubuntu:Pro:18.04:LTS
 before 0.2.1-1ubuntu0.1+esm2, plus listed versions
0.2.0-10.2.0-20.2.0-40.2.1-10.2.1-1ubuntu0.1
0.2.1-1ubuntu0.1+esm2
bubblewrap
Ubuntu:Pro:18.04:LTS
From an advisory covering 2 CVEs
 before 0.2.1-1ubuntu0.1+esm2, plus listed versions
0.2.0-10.2.0-20.2.0-40.2.1-10.2.1-1ubuntu0.1
0.2.1-1ubuntu0.1+esm2
bubblewrap
Ubuntu:Pro:20.04:LTS
From an advisory covering 2 CVEs
 before 0.4.0-1ubuntu4.1+esm2, plus listed versions
0.3.3-20.4.0-10.4.0-1ubuntu10.4.0-1ubuntu20.4.0-1ubuntu30.4.0-1ubuntu40.4.0-1ubuntu4.1
0.4.0-1ubuntu4.1+esm2
bubblewrap
Ubuntu:22.04:LTS
From an advisory covering 2 CVEs
 before 0.6.1-1ubuntu0.2, plus listed versions
0.4.1-3build10.5.0-10.6.0-10.6.1-10.6.1-1ubuntu0.1
0.6.1-1ubuntu0.2
bubblewrap
Ubuntu:24.04:LTS
From an advisory covering 2 CVEs
 before 0.9.0-1ubuntu0.2, plus listed versions
0.8.0-20.9.0-1build10.9.0-1ubuntu0.1
0.9.0-1ubuntu0.2
bubblewrap
Ubuntu:26.04:LTS
From an advisory covering 2 CVEs
 before 0.11.1-1ubuntu0.2, plus listed versions
0.11.0-20.11.0-2build10.11.1-10.11.1-1ubuntu0.1
0.11.1-1ubuntu0.2
bubblewrap
openSUSE:Leap 15.1
 before 0.3.3-lp151.2.3.1
0.3.3-lp151.2.3.1
bubblewrap
openSUSE:Leap 15.0
 before 0.2.0-lp150.2.3.1
0.2.0-lp150.2.3.1
bubblewrap
openSUSE:Tumbleweed
From an advisory covering 3 CVEs
 before 0.5.0-1.1
0.5.0-1.1

History

History
RecordedChangedSources
affectedOSV
factsOSV
aliasesEUVD, OSV
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-12439 is a high vulnerability (CVSS 7.4) in Projectatomic Bubblewrap, published May 29, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in bubblewrap 0.2.1-1ubuntu0.1+tuxcare.els1.

References

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