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CVE-2019-8308

22
FAUCET Score

CVE-2019-8308 is a high-severity vulnerability affecting Flatpak versions before 1.0.7, and 1.1.x/1.2.x before 1.2.3, which exposes the /proc filesystem within the apply_extra script sandbox. This exposure allows a local attacker to modify host-side executable files, leading to high impact on confidentiality, integrity, and availability. While there are no known active exploits or public exploit code, the vulnerability has garnered some community discussion, indicating awareness of its potential.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.7CPE matchmatch criteria
cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
>= 1.1.0, <= 1.1.3CPE matchmatch criteria
cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
>= 1.2.0, <= 1.2.3CPE matchmatch criteria
cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.2HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.5
Impact Score
6.0
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.47%
Probability of exploitation in next 30 days
EPSS Percentile
37.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0047 is in the 70th percentile among its peer group of 759 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: flatpak-0:1.0.2-4.el7_6
View patch

Vendor Advisories (1)

redhatCVE-2019-8308Important

flatpak: potential /proc based sandbox escape

Feb 11, 2019

References

lists.opensuse.org / opensuse-security-announce/2019-08/msg00088.html
access.redhat.com / errata/RHSA-2019:0375
Third Party Advisory
bugs.debian.org / cgi-bin/bugreport.cgi
Issue TrackingMailing ListThird Party Advisory
github.com / flatpak/flatpak/releases/tag/1.0.7
Third Party Advisory
github.com / flatpak/flatpak/releases/tag/1.2.3
Third Party Advisory