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CVE record · CVE-2018-6340

Out-of-bounds read in Facebook HHVM

CVSS 8.1 HighEPSS 0.014 · 73rd percentile

Published by the CVE Program (CNA: facebook) at 31 Dec 2018, 22:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Facebook HHVM
  • affected 3.30.1
  • affected 3.30.0 to before unspecified custom
  • affected 3.27.5
  • affected unspecified to before 3.27.5 custom
Identifiers
CVE-2018-6340
CNA
facebook
Weakness (CWE)
CWE-125
Tags
Published
31 Dec 2018
Updated
6 May 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.1 High 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H ADP (CISA-ADP)
  • CISA KEV Not listed.
  • EPSS 0.014, the 73rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 31 Dec 2018. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.