CVE Intelligence
CISA KEV Critical Memory corruption exploit reference

CVE-2019-11043 — PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability

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.

Published Oct 28, 2019 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, NIST National Vulnerability Database, GitHub Security Advisories, CVE Program (cve.org) e CISA ADP · CNA: php

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Mar 25, 2022 R used by ransomware (CISA) Detection templates (Nuclei) · 1Metasploit modules · 1Exploit-DB · 2Proofs of concept on GitHub · 28
How the score was calculated
  • Confirmed exploitation (CISA KEV)+35
  • Used in ransomware campaigns (CISA)+10
  • Public exploit/PoC (nuclei, metasploit, exploitdb, github)+20
  • EPSS 99.7% (30-day exploitation probability)+15
  • Technical severity (critical)+10

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Confirmed
CISA KEV, listed Mar 25, 2022
EPSS FIRST
99.75%
ahead of 100% of scored CVEs · Oct 14, 2026
Affects
Canonical
Ubuntu Linux and 22 more
CVSS base
9.8
Critical · 4 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Active
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Total
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — bugs.php.net (NIST National Vulnerability Database)

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: Apr 15, 2022 — passed 1644 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora…).
  2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
  3. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  4. Apply the fixed version or the patch documented under Remediation.
  5. EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
  6. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Canonical Ubuntu Linux version 12.04version 14.04version 16.04version 18.04version 19.04version 19.10 Vulnerable NIST National Vulnerability Database
Debian Debian Linux version 9.0version 10.0 Vulnerable NIST National Vulnerability Database
Fedoraproject Fedora version 30version 31version 29 Vulnerable NIST National Vulnerability Database
Php Php ≥ 7.1.x and < 7.1.33≥ 7.3.x and < 7.3.11≥ 7.2.x and < 7.2.24 Vulnerable CVE Program (cve.org) e CISA ADP
Php Php ≥ 7.3.0 and < 7.3.11≥ 7.2.0 and < 7.2.24≥ 7.1.0 and < 7.1.33 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux version 8.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Desktop version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Eus version 7.7version 8.1version 8.2version 8.4version 8.6version 8.8 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Eus Compute Node version 7.7 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Arm 64 version 8.0_aarch64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Arm 64 Eus version 8.4_aarch64version 8.6_aarch64version 8.8_aarch64version 8.1_aarch64version 8.2_aarch64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Ibm Z Systems version 6.0_s390xversion 7.0_s390xversion 8.0_s390x Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Ibm Z Systems Eus version 7.7_s390xversion 8.1_s390xversion 8.2_s390xversion 8.4_s390xversion 8.6_s390xversion 8.8_s390x Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Big Endian version 6.0_ppc64version 7.0_ppc64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Big Endian Eus version 7.7_ppc64 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Little Endian version 7.0_ppc64leversion 8.0_ppc64le Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Power Little Endian Eus version 8.1_ppc64leversion 8.8_ppc64leversion 8.4_ppc64leversion 8.6_ppc64leversion 7.7_ppc64leversion 8.2_ppc64le Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux For Scientific Computing version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server Aus version 8.4version 8.6version 8.2version 7.7 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Server Tus version 7.7version 8.2version 8.4version 8.6version 8.8 Vulnerable NIST National Vulnerability Database
Red Hat Enterprise Linux Workstation version 6.0version 7.0 Vulnerable NIST National Vulnerability Database
Red Hat Software Collections version 1.0 Vulnerable NIST National Vulnerability Database
Tenable Tenable.sc < 5.19.0 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
9.8 CVSS 3.1 Critical 3.9 5.9 nvd@nist.gov via NIST National Vulnerability Database
9.8 CVSS 3.1 Critical — — GitHub, Inc. via GitHub Security Advisories
8.7 CVSS 3.1 High 2.2 5.8 security@php.net via NIST National Vulnerability Database
8.7 CVSS 3.1 High — — php via CVE Program (cve.org) e CISA ADP
7.5 CVSS 2.0 High 10.0 6.4 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)
Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 9.8 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-787 · Out-of-bounds Write

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed
Mar 25, 2022
Federal deadline
Apr 15, 2022
passed 1644 day(s) ago
Ransomware use
Known

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Detection templates (Nuclei)
Metasploit modules
Exploit-DB
Proofs of concept on GitHub — 28 repositories; showing the 10 most starred

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 99.75%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
  • Hunt retroactively in logs from before Mar 25, 2022 (KEV listing): exploitation may have started earlier.
web/proxy/WAF logsnetwork IDS/IPSendpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · php/php
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • Affected products added · php/php, canonical/ubuntu linux, debian/debian linux, fedoraproject/fedora, tenable/tenable.sc, redhat/software collecti
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 9.8
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Analyzed
    Oct 13, 2026 · NIST National Vulnerability Database
  • Added to CISA KEV (detected)
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • Record created in this database
    Oct 13, 2026 · CISA Known Exploited Vulnerabilities
  • 2022
  • Added to CISA KEV catalog
    Mar 24, 2022 · CISA
  • 2019
  • CVE published
    Oct 28, 2019 · php

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

40 on the record

Elsewhere on this site

Canonical
every CVE for this vendor
2022-03
what else CISA listed that month
Memory corruption
same class
CWE-787
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests 9d
  • CVE-2026-104045 Sssd: sssd: denial of service via race condition in autofs responder 9d
  • CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation 9d
  • CVE-2026-104047 Sssd: sssd: information disclosure via query injection in entra id lookups 9d
  • CVE-2026-102558 Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growth 16d
  • CVE-2026-102555 Libsoup: libsoup: heap buffer overflow via uninitialized length in data-uri base64 decoding 16d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2019-11043 is "PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability", rated Critical. It affects Ubuntu Linux (Canonical); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 9.8 describes technical severity. EPSS 99.75% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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