Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2019-15544

25
FAUCET Score

CVE-2019-15544 is a denial-of-service vulnerability affecting the Rust protobuf crate prior to version 2.6.0, as well as Apache HBase and rust-protobuf projects. It allows unauthenticated attackers to exhaust system memory through crafted Vec::reserve calls. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with no user interaction, leading to a complete loss of availability. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.7.5CPE matchmatch criteria
cpe:2.3:a:rust-protobuf_project:rust-protobuf:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.6.0CPE matchmatch criteria
cpe:2.3:a:rust-protobuf_project:rust-protobuf:*:*:*:*:*:*:*:*
2.2.3CPE matchmatch criteria
cpe:2.3:a:apache:hbase:2.2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.76%
Probability of exploitation in next 30 days
EPSS Percentile
88.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0376 is in the 80th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: protobufFixed in: 2.6.0

Vendor Advisories (1)

rustGHSA-mh6h-f25p-98f8high

Uncontrolled memory consumption in protobuf

Aug 25, 2021

References

lists.apache.org / thread.html/r00097d0b5b6164ea428554007121d5dc1f88ba2af7b9e977a10572cd%40%3Cdev.hbase.apache.org%3E
lists.apache.org / thread.html/r4ef574a5621b0e670a3ce641e9922543e34f22bf4c9ee9584aa67fcf%40%3Cissues.hbase.apache.org%3E
lists.apache.org / thread.html/r7fed8dd9bee494094e7011cf3c2ab75bd8754ea314c6734688c42932%40%3Ccommon-issues.hadoop.apache.org%3E
lists.apache.org / thread.html/rd64381fb8f92d640c1975dc50dcdf1b8512e02a2a7b20292d3565cae%40%3Cissues.hbase.apache.org%3E
rustsec.org / advisories/RUSTSEC-2019-0003.html
Third Party Advisory