CVE-2019-10063

Flatpak before 1.0.8, 1.1.x and 1.2.x before 1.2.4, and 1.3.x before 1.3.1 allows a sandbox bypass. Flatpak versions since 0.8.1 address CVE-2017-5226 by using a seccomp filter to prevent sandboxed apps from using the TIOCSTI ioctl, which could otherwise be used to inject commands into the controlling terminal so that they would be executed outside the sandbox after the sandboxed app exits. This fix was incomplete: on 64-bit platforms, the seccomp filter could be bypassed by an ioctl request number that has TIOCSTI in its 32 least significant bits and an arbitrary nonzero value in its 32 most significant bits, which the Linux kernel would treat as equivalent to TIOCSTI.

Published: 2019-03-26 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-10063 is rated Moderate Risk (64.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.91%). EPSS rose +1.51% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2019-10063

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.40% 1.91% +1.51%
2 2026-06-03 0.15% 0.40% +0.25%
3 2026-05-27 — 0.15% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-10063

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.0 3.0 CRITICAL
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 6.0 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2019-10063

OS Trackers for CVE-2019-10063

vendor priority summary link
alpine critical CVE-2019-10063: 1 source package rows (flatpak); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2019-10063
debian not yet assigned CVE-2019-10063 not yet assigned priority: Debian including 1 source packages (flatpak), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-10063
redhat high — https://access.redhat.com/security/cve/CVE-2019-10063
suse high CVE-2019-10063 severity important: SUSE including 77 source package names (flatpak, flatpak-1.0.2-5.el7_6, …), 172 product×package rows across 38 product lines (SUSE CaaS Platform 4.0, SUSE CaaS Platform 4.5, … (38 product lines)): Known Not Affected 89, Fixed 83. https://www.suse.com/security/cve/CVE-2019-10063/
ubuntu medium CVE-2019-10063 medium priority: Ubuntu including 1 source packages (flatpak), 6 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): released 3, DNE 2, not-affected 1. https://ubuntu.com/security/CVE-2019-10063

Affected software / configurations for CVE-2019-10063

Vendor Product Version Raw CPE
flatpak flatpak < 1.0.8 cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
flatpak flatpak >= 1.1.0, <= 1.1.3 cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
flatpak flatpak >= 1.2.0, < 1.2.4 cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
flatpak flatpak 1.3.0 cpe:2.3:a:flatpak:flatpak:1.3.0:*:*:*:*:*:*:*

References for CVE-2019-10063

cvelogic Threat Intelligence