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Weekly Signal
Live intelligence Updated 19 Aug 2026 · 20:27 UTC

Canonical, Debian, Fedoraproject +3 more · Ubuntu Linux, Debian Linux, Fedora +21 more

CVE-2019-11043

PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability

Recommended action

Treat this as an immediate remediation priority. Apply updates per vendor instructions.

View response plan
CVSS9.8
EPSS99.4%
KEVYes
ExploitationConfirmed exploitation
PatchPatch or guidance available ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 99.4%; technical severity is CVSS 9.8.

In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.

Who should care

  • Teams operating Ubuntu Linux, Debian Linux, Fedora +21 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Ubuntu Linux, Debian Linux, Fedora +21 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Apply updates per vendor instructions.
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Vendor remediation

Patch and remediation links

Use the vendor source below to confirm the correct fixed version, package or mitigation for your affected product.

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-120
Affected versions
Canonical Ubuntu Linux (Version: 19.10); Debian Debian Linux (Version: 10.0); Fedoraproject Fedora (Version: 31); Php FastCGI Process Manager (FPM); Php Php (Start Including: 7.3.0, End Excluding: 7.3.11); Redhat Enterprise Linux (Version: 8.0); Redhat Enterprise Linux Desktop (Version: 7.0); Redhat Enterprise Linux Eus (Version: 8.8)
Published
28 October 2019
Attack vector
Network
Privileges required
None
User interaction
None

Signal timeline

  1. CVE published
  2. Added to CISA KEV
  3. Latest EPSS score: 99.4%
  4. Signal calculated at 88

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.