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CVE-2019-18684

21
FAUCET Score

CVE-2019-18684 describes a race condition vulnerability in Sudo versions up to 1.8.29, potentially allowing a local user with write access to file descriptor 3 of the sudo process to escalate privileges to root. This high-severity vulnerability (CVSS 7.0) requires specific conditions, including write access to a sensitive file descriptor, and its practical exploitability has been disputed due to Linux /proc filesystem behavior. There is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8.29CPE matchmatch criteria
cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.0HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 55th percentile among its peer group of 1,525 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2019-18684Moderate

sudo: privilege escalation via write access to file descriptor 3 of the sudo process

Nov 7, 2019

References

gist.github.com / oxagast/51171aa161074188a11d96cbef884bbd
ExploitThird Party Advisory