CVE-2019-8308

Flatpak before 1.0.7, and 1.1.x and 1.2.x before 1.2.3, exposes /proc in the apply_extra script sandbox, which allows attackers to modify a host-side executable file.

Published: 2019-02-12 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-8308 is rated Moderate Risk (46/100): CVSS High severity, with low exploitation likelihood (EPSS 0.47%). 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-2019-8308

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 0.07% 0.47% +0.40%
2 2025-03-30 0.18% 0.07% -0.11%
3 2025-03-29 — 0.18% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-8308

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.2 3.0 HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
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.
 1.5 6.0 [email protected]
4.4 2.0 MEDIUM
AV:L/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
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.
 3.4 6.4 [email protected]

Weakness enumeration for CVE-2019-8308

OS Trackers for CVE-2019-8308

vendor priority summary link
debian not yet assigned CVE-2019-8308 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-2019-8308
redhat high — https://access.redhat.com/security/cve/CVE-2019-8308
suse high CVE-2019-8308 severity important: SUSE including 12 source package names (flatpak-0.10.4-4.10.1, flatpak-0.10.4-lp150.8.1, …), 12 product×package rows across 3 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Module for Desktop Applications 15, openSUSE Leap 15.0): Fixed 12. https://www.suse.com/security/cve/CVE-2019-8308/
ubuntu medium CVE-2019-8308 medium priority: Ubuntu including 1 source packages (flatpak), 5 status rows across 5 suites (bionic, cosmic, trusty, upstream, xenial): released 3, DNE 2. https://ubuntu.com/security/CVE-2019-8308

Affected software / configurations for CVE-2019-8308

Vendor Product Version Raw CPE
flatpak flatpak < 1.0.7 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, <= 1.2.3 cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
redhat enterprise_linux_desktop 7.0 cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server 7.0 cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
redhat enterprise_linux_server_aus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_eus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_server_tus 7.6 cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
redhat enterprise_linux_workstation 7.0 cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*

References for CVE-2019-8308

cvelogic Threat Intelligence