CVE-2019-12439

Severity: high (CVSS 7.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-29 · updated 2026-06-17
Weakness: CWE-20

Description

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.

Affected products

Projectatomic Bubblewrap: before 0.3.3 — fixed in 0.3.3

How to fix

Upgrade to a fixed version: Projectatomic Bubblewrap 0.3.3. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00015.html
https://access.redhat.com/errata/RHSA-2019:1833
https://bugzilla.redhat.com/show_bug.cgi?id=1695963
https://github.com/projectatomic/bubblewrap/commit/efc89e3b939b4bde42c10f065f6b7b02958ed50e
https://github.com/projectatomic/bubblewrap/issues/304
https://github.com/projectatomic/bubblewrap/releases/tag/v0.3.3
https://security.gentoo.org/glsa/202006-18
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00028.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00015.html
https://access.redhat.com/errata/RHSA-2019:1833
https://bugzilla.redhat.com/show_bug.cgi?id=1695963

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