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Full vulnerability report · 2020
CVE-2019-20838High confidence

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454

n/a · n/a

7.5HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivepcre3Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical record ↗Source updated 9 Sept 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2019-11375

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

What

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-125

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-125
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-2229Splunk Splunk Enterprise: Mehrere Schwachstellen

Ein entfernter, authentifizierter Angreifer kann mehrere Schwachstellen in Splunk Splunk Enterprise ausnutzen, um beliebigen Code auszuführen, einen 'Denial of Service'-Zustand zu verursachen, seine Privilegien zu erweitern und weitere, nicht spezifizierte Auswirkungen zu verursachen.

Official advisory
BSI · German · WID-SEC-W-2023-1614Tenable Security Nessus Network Monitor: Mehrere Schwachstellen

Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Tenable Security Nessus Network Monitor ausnutzen, um beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen und Daten zu manipulieren.

Official advisory
BSI · German · WID-SEC-W-2022-1897PCRE (Perl Compatible Regular Expressions): Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in PCRE (Perl Compatible Regular Expressions) ausnutzen, um einen Denial of Service Angriff durchzuführen oder weitere, nicht definierte Auswirkungen zu erzielen.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

d?id=CVE-2019-13147 Référence CVE CVE-2019-13232 https://www.cve.org/CVERecord?id=CVE-2019-13232 Référence CVE CVE-2019-14844 https://www.cve.org/CVERecord?id=CVE-2019-14844 Référence CVE CVE-2019-16775 https://www.cve.org/CVERecord?id=CVE-2019-16775 Référence CVE CVE-2019-16776 https://www.cve.org/CVERecord?id=CVE-2019-16776 Référence CVE CVE-2019-16777 https://www.cve.org/CVERecord?id=CVE-2019-16777 Référence CVE CVE-2019-17547 https://www.cve.org/CVERecord?id=CVE-2019-17547 Référence CVE CVE-2019-18276 https://www.cve.org/CVERecord?id=CVE-2019-18276 Référence CVE CVE-2019-19906 https://www.cve.org/CVERecord?id=CVE-2019-19906 Référence CVE CVE-2019-20838 https://www.cve.org/CVERecord?id=CVE-2019-20838 Référence CVE CVE-2019-25013 https://www.cve.org/CVERecord?id=CVE-2019-25013 Référence CVE CVE-2019-2708 https://www.cve.org/CVERecord?id=CVE-2019-2708 Référence CVE CVE-2019-3792 https://www.cve.org/CVERecord?id=CVE-2019-3792 Référence CVE CVE-2019-6293 https://www.cve.org/CVERecord?id=CVE-2019-6293 Référence CVE CVE-2019-6461 https://www.cve.org/CVERecord?id=CVE-2019-6461 Référence CVE CVE-2019-6462 https://www.cve.org/CVERecord?id=CVE-2019-6462 Référence CVE CVE-2019-8321 https://www.cve.org/CVERecord?id=CVE-2019-8321 Référence CVE CVE-2019-8322 https://www.cve.org/CVERecord?id=CVE-2019-8322

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0701Multiples vulnérabilités dans Splunk

letin de sécurité Splunk SVD-2023-0809 du 30 août 2023 https://advisory.splunk.com/advisories/SVD-2023-0809 Bulletin de sécurité Splunk SVD-2023-0810 du 30 août 2023 https://advisory.splunk.com/advisories/SVD-2023-0810 Bulletin de sécurité Splunk SVD-2023-0811 du 30 août 2023 https://advisory.splunk.com/advisories/SVD-2023-0811 Référence CVE CVE-2013-7489 https://www.cve.org/CVERecord?id=CVE-2013-7489 Référence CVE CVE-2018-10237 https://www.cve.org/CVERecord?id=CVE-2018-10237 Référence CVE CVE-2018-20225 https://www.cve.org/CVERecord?id=CVE-2018-20225 Référence CVE CVE-2019-20454 https://www.cve.org/CVERecord?id=CVE-2019-20454 Référence CVE CVE-2019-20838 https://www.cve.org/CVERecord?id=CVE-2019-20838 Référence CVE CVE-2020-14155 https://www.cve.org/CVERecord?id=CVE-2020-14155 Référence CVE CVE-2020-28469 https://www.cve.org/CVERecord?id=CVE-2020-28469 Référence CVE CVE-2020-28851 https://www.cve.org/CVERecord?id=CVE-2020-28851 Référence CVE CVE-2020-29652 https://www.cve.org/CVERecord?id=CVE-2020-29652 Référence CVE CVE-2020-8169 https://www.cve.org/CVERecord?id=CVE-2020-8169 Référence CVE CVE-2020-8177 https://www.cve.org/CVERecord?id=CVE-2020-8177 Référence CVE CVE-2020-8231 https://www.cve.org/CVERecord?id=CVE-2020-8231 Référence CVE CVE-2020-8284 https://www.cve.org/CVERecord?id=CVE-202

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0499Multiples vulnérabilités dans Tenable Nessus Network Monitor

d?id=CVE-2019-19880 Référence CVE CVE-2019-19923 https://www.cve.org/CVERecord?id=CVE-2019-19923 Référence CVE CVE-2019-19924 https://www.cve.org/CVERecord?id=CVE-2019-19924 Référence CVE CVE-2019-19925 https://www.cve.org/CVERecord?id=CVE-2019-19925 Référence CVE CVE-2019-19926 https://www.cve.org/CVERecord?id=CVE-2019-19926 Référence CVE CVE-2019-19956 https://www.cve.org/CVERecord?id=CVE-2019-19956 Référence CVE CVE-2019-19959 https://www.cve.org/CVERecord?id=CVE-2019-19959 Référence CVE CVE-2019-20218 https://www.cve.org/CVERecord?id=CVE-2019-20218 Référence CVE CVE-2019-20388 https://www.cve.org/CVERecord?id=CVE-2019-20388 Référence CVE CVE-2019-20838 https://www.cve.org/CVERecord?id=CVE-2019-20838 Référence CVE CVE-2019-5815 https://www.cve.org/CVERecord?id=CVE-2019-5815 Référence CVE CVE-2019-8457 https://www.cve.org/CVERecord?id=CVE-2019-8457 Référence CVE CVE-2019-9936 https://www.cve.org/CVERecord?id=CVE-2019-9936 Référence CVE CVE-2019-9937 https://www.cve.org/CVERecord?id=CVE-2019-9937 Référence CVE CVE-2020-11655 https://www.cve.org/CVERecord?id=CVE-2020-11655 Référence CVE CVE-2020-11656 https://www.cve.org/CVERecord?id=CVE-2020-11656 Référence CVE CVE-2020-13434 https://www.cve.org/CVERecord?id=CVE-2020-13434 Référence CVE CVE-2020-13435 https://www.cve.org/CVERecord?id=CVE-2020

Official advisory
CERT-FR · French · CERTFR-2022-AVI-386Multiples vulnérabilités dans IBM QRadar SIEM

ermettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à l'intégrité des données. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité IBM 6574453 du 25 avril 2022 https://www.ibm.com/support/pages/node/6574453 Bulletin de sécurité IBM 6574787 du 25 avril 2022 https://www.ibm.com/support/pages/node/6574787 Référence CVE CVE-2019-17594 https://www.cve.org/CVERecord?id=CVE-2019-17594 Référence CVE CVE-2019-17595 https://www.cve.org/CVERecord?id=CVE-2019-17595 Référence CVE CVE-2019-20838 https://www.cve.org/CVERecord?id=CVE-2019-20838 Référence CVE CVE-2020-12762 https://www.cve.org/CVERecord?id=CVE-2020-12762 Référence CVE CVE-2020-14155 https://www.cve.org/CVERecord?id=CVE-2020-14155 Référence CVE CVE-2020-16135 https://www.cve.org/CVERecord?id=CVE-2020-16135 Référence CVE CVE-2020-24370 https://www.cve.org/CVERecord?id=CVE-2020-24370 Référence CVE CVE-2020-8022 https://www.cve.org/CVERecord?id=CVE-2020-8022 Référence CVE CVE-2020-9488 https://www.cve.org/CVERecord?id=CVE-2020-9488 Référence CVE CVE-2021-20231 https://www.cve.org/CVERecord?id=CVE-2021-20231 Référence CVE CVE-2021-20232 https://www.cve.org/CVERecord?id=CVE-

Official advisory
CERT-FR · French · CERTFR-2021-AVI-072Multiples vulnérabilités dans les produits Apple

021-001 Safari versions antérieures à 14.0.3 Résumé De multiples vulnérabilités ont été découvertes dans les produits Apple. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et un contournement de la politique de sécurité. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Apple HT212147 du 01 février 2021 https://support.apple.com/fr-fr/HT212147 Bulletin de sécurité Apple HT212152 du 01 février 2021 https://support.apple.com/fr-fr/HT212152 Référence CVE CVE-2019-20838 https://www.cve.org/CVERecord?id=CVE-2019-20838 Référence CVE CVE-2020-14155 https://www.cve.org/CVERecord?id=CVE-2020-14155 Référence CVE CVE-2020-15358 https://www.cve.org/CVERecord?id=CVE-2020-15358 Référence CVE CVE-2020-25709 https://www.cve.org/CVERecord?id=CVE-2020-25709 Référence CVE CVE-2020-27904 https://www.cve.org/CVERecord?id=CVE-2020-27904 Référence CVE CVE-2020-27937 https://www.cve.org/CVERecord?id=CVE-2020-27937 Référence CVE CVE-2020-27938 https://www.cve.org/CVERecord?id=CVE-2020-27938 Référence CVE CVE-2020-27945 https://www.cve.org/CVERecord?id=CVE-2020-27945 Référence CVE CVE-2020-29608 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2020-AVI-747Multiples vulnérabilités dans les produits Apple

de provoquer une exécution de code arbitraire, une atteinte à l'intégrité des données et une atteinte à la confidentialité des données. Solution Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité Apple HT211931 du 12 novembre 2020 https://support.apple.com/fr-fr/HT211931 Bulletin de sécurité Apple HT211934 du 12 novembre 2020 https://support.apple.com/fr-fr/HT211934 Bulletin de sécurité Apple HT211946 du 12 novembre 2020 https://support.apple.com/fr-fr/HT211946 Référence CVE CVE-2019-14899 https://www.cve.org/CVERecord?id=CVE-2019-14899 Référence CVE CVE-2019-20838 https://www.cve.org/CVERecord?id=CVE-2019-20838 Référence CVE CVE-2020-10002 https://www.cve.org/CVERecord?id=CVE-2020-10002 Référence CVE CVE-2020-10003 https://www.cve.org/CVERecord?id=CVE-2020-10003 Référence CVE CVE-2020-10004 https://www.cve.org/CVERecord?id=CVE-2020-10004 Référence CVE CVE-2020-10006 https://www.cve.org/CVERecord?id=CVE-2020-10006 Référence CVE CVE-2020-10007 https://www.cve.org/CVERecord?id=CVE-2020-10007 Référence CVE CVE-2020-10009 https://www.cve.org/CVERecord?id=CVE-2020-10009 Référence CVE CVE-2020-10010 https://www.cve.org/CVERecord?id=CVE-2020-10010 Référence CVE CVE-2020-10012 https://www.cve.org/CVERecord?id=

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
n/a
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 15 Jun 2020 · Last source change 5 Aug 2024, 02:53 UTC · CWE-125 · Out-of-bounds Read

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2019-11375
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2019-20838 · cve.blacktree.nl