BlackTreeCVE Intelligence
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Full vulnerability report · 2017
CVE-2017-8824High confidence

n/a Linux kernel through 4.14.3: Use After Free

Unknown · Linux kernel through 4.14.3

7.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 1.34% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Linux kernel through 4.14.3 and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
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.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.4.14.7-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.4.14.7-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.4.14.7-1Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcelinuxVendor fix publishedDebian records a fixed source-package version for this release.4.14.7-1Debian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-raspi-realtimeAffected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Optional official sources

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

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

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-2017-17767

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 with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

The dccp_disconnect function in net/dccp/proto.c in the Linux kernel through 4.14.3 allows local users to gain privileges or cause a denial of service (use-after-free) via an AF_UNSPEC connect system call during the DCCP_LISTEN state.

What

The dccp_disconnect function in net/dccp/proto.c in the Linux kernel through 4.14.3 allows local users to gain privileges or cause a denial of service (use-after-free) via an AF_UNSPEC connect system call during the DCCP_LISTEN state.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

The dccp_disconnect function in net/dccp/proto.c in the Linux kernel through 4.14.3 allows local users to gain privileges or cause a denial of service (use-after-free) via an AF_UNSPEC connect system call during the DCCP_LISTEN state.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Use After Free → disrupt the affected service
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
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-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

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

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

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Denial of serviceCWE-416Public exploit reference
A

Official authority intelligence

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

CERT-FR · French · CERTFR-2021-AVI-755Multiples vulnérabilités dans F5 BIG-IP

De multiples vulnérabilités ont été découvertes dans F5 BIG-IP. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, une exécution de code arbitraire et un déni de service à distance.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-228Multiples vulnérabilités dans le noyau Linux de RedHat

De multiples vulnérabilités ont été découvertes dans le noyau Linux de RedHat. Certaines d'entre elles permettent à un attaquant de provoquer un déni de service, une atteinte à l'intégrité des données et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-200Vulnérabilité dans le noyau Linux de RedHat

Une vulnérabilité a été découverte dans le noyau Linux de RedHat. Elle permet à un attaquant de provoquer une élévation de privilèges.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-094Multiples vulnérabilités dans le noyau Linux d'Ubuntu

org/CVERecord?id=CVE-2017-17712 Référence CVE CVE-2017-17806 https://www.cve.org/CVERecord?id=CVE-2017-17806 Référence CVE CVE-2017-18017 https://www.cve.org/CVERecord?id=CVE-2017-18017 Référence CVE CVE-2017-5669 https://www.cve.org/CVERecord?id=CVE-2017-5669 Référence CVE CVE-2017-5715 https://www.cve.org/CVERecord?id=CVE-2017-5715 Référence CVE CVE-2017-5753 https://www.cve.org/CVERecord?id=CVE-2017-5753 Référence CVE CVE-2017-5754 https://www.cve.org/CVERecord?id=CVE-2017-5754 Référence CVE CVE-2017-7542 https://www.cve.org/CVERecord?id=CVE-2017-7542 Référence CVE CVE-2017-7889 https://www.cve.org/CVERecord?id=CVE-2017-7889 Référence CVE CVE-2017-8824 https://www.cve.org/CVERecord?id=CVE-2017-8824 Référence CVE CVE-2018-5333 https://www.cve.org/CVERecord?id=CVE-2018-5333 Référence CVE CVE-2018-5344 https://www.cve.org/CVERecord?id=CVE-2018-5344 Gestion détaillée du document le 22 février 2018 Version initiale le 23 février 2018 Ajout des avis de sécurité Ubuntu du 23 février 2018 Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-056Multiples vulnérabilités dans le noyau Linux de SUSE

CVERecord?id=CVE-2017-17448 Référence CVE CVE-2017-17449 https://www.cve.org/CVERecord?id=CVE-2017-17449 Référence CVE CVE-2017-17450 https://www.cve.org/CVERecord?id=CVE-2017-17450 Référence CVE CVE-2017-17805 https://www.cve.org/CVERecord?id=CVE-2017-17805 Référence CVE CVE-2017-17806 https://www.cve.org/CVERecord?id=CVE-2017-17806 Référence CVE CVE-2017-5715 https://www.cve.org/CVERecord?id=CVE-2017-5715 Référence CVE CVE-2017-5753 https://www.cve.org/CVERecord?id=CVE-2017-5753 Référence CVE CVE-2017-5754 https://www.cve.org/CVERecord?id=CVE-2017-5754 Référence CVE CVE-2017-7482 https://www.cve.org/CVERecord?id=CVE-2017-7482 Référence CVE CVE-2017-8824 https://www.cve.org/CVERecord?id=CVE-2017-8824 Gestion détaillée du document le 26 janvier 2018 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-051Multiples vulnérabilités dans le noyau Linux de SUSE

CVERecord?id=CVE-2017-16939 Référence CVE CVE-2017-17450 https://www.cve.org/CVERecord?id=CVE-2017-17450 Référence CVE CVE-2017-17558 https://www.cve.org/CVERecord?id=CVE-2017-17558 Référence CVE CVE-2017-17805 https://www.cve.org/CVERecord?id=CVE-2017-17805 Référence CVE CVE-2017-17806 https://www.cve.org/CVERecord?id=CVE-2017-17806 Référence CVE CVE-2017-5715 https://www.cve.org/CVERecord?id=CVE-2017-5715 Référence CVE CVE-2017-5753 https://www.cve.org/CVERecord?id=CVE-2017-5753 Référence CVE CVE-2017-5754 https://www.cve.org/CVERecord?id=CVE-2017-5754 Référence CVE CVE-2017-7472 https://www.cve.org/CVERecord?id=CVE-2017-7472 Référence CVE CVE-2017-8824 https://www.cve.org/CVERecord?id=CVE-2017-8824 Gestion détaillée du document le 24 janvier 2018 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-032Multiples vulnérabilités dans le noyau Linux de SUSE

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE . Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, un déni de service et un contournement de la politique de sécurité.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-018Multiples vulnérabilités dans le noyau Linux de Debian

De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Elles permettent à un attaquant de provoquer un déni de service, une atteinte à la confidentialité des données et une élévation de privilèges.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-014Multiples vulnérabilités dans le noyau Linux de SUSE

CVERecord?id=CVE-2017-16939 Référence CVE CVE-2017-17450 https://www.cve.org/CVERecord?id=CVE-2017-17450 Référence CVE CVE-2017-17558 https://www.cve.org/CVERecord?id=CVE-2017-17558 Référence CVE CVE-2017-17805 https://www.cve.org/CVERecord?id=CVE-2017-17805 Référence CVE CVE-2017-17806 https://www.cve.org/CVERecord?id=CVE-2017-17806 Référence CVE CVE-2017-5715 https://www.cve.org/CVERecord?id=CVE-2017-5715 Référence CVE CVE-2017-5753 https://www.cve.org/CVERecord?id=CVE-2017-5753 Référence CVE CVE-2017-5754 https://www.cve.org/CVERecord?id=CVE-2017-5754 Référence CVE CVE-2017-7472 https://www.cve.org/CVERecord?id=CVE-2017-7472 Référence CVE CVE-2017-8824 https://www.cve.org/CVERecord?id=CVE-2017-8824 Gestion détaillée du document le 09 janvier 2018 Version initiale le 10 janvier 2018 Ajout d'un bulletin et mise à jour des systèmes affectés Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Défense et de la Sécurité Nationale / Agence nationale de la sécurité des systèmes d'information

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-009Multiples vulnérabilités dans le noyau Linux de SUSE

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE . Certaines d'entre elles permettent à un attaquant de provoquer un déni de service, un contournement de la politique de sécurité et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-005Multiples vulnérabilités dans le noyau Linux de SUSE

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE . Certaines d'entre elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur, un déni de service et une atteinte à la confidentialité des données.

Official advisory ↗
CERT-FR · French · CERTFR-2017-AVI-482Multiples vulnérabilités dans le noyau Linux de SUSE

De multiples vulnérabilités ont été découvertes dans le noyau Linux de SUSE . Certaines d'entre elles permettent à un attaquant de provoquer un déni de service, un contournement de la politique de sécurité et une atteinte à la confidentialité des données.

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2017-011190Linux Kernel における解放済みメモリの使用に関する脆弱性

Linux Kernel には、解放済みメモリの使用に関する脆弱性が存在します。

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.
Fix not verified
Affected
Linux kernel through 4.14.3: Linux kernel through 4.14.3
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 5 Dec 2017 · Last source change 5 Aug 2024, 16:48 UTC · CWE-416 · Use After Free

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 2026-09-01
European sourceENISA EUVD · EUVD-2017-17767
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceNIST NVD
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗
  1. ENISA EUVD mappingEUVD-2017-17767 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2017-17767"}
    ENISA EUVD ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: removed vendor advisory: access.redhat.com/RHSA-2018:0399; removed vendor advisory: access.redhat.com/RHSA-2018:0676; 16 further removals.
    Before
    vendor advisory: access.redhat.com/RHSA-2018:0399 · vendor advisory: access.redhat.com/RHSA-2018:0676 · vendor advisory: access.redhat.com/RHSA-2018:1062 · 15 more references
    After
    no authoritative guidance recorded
    CNA ↗
  3. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD ↗
  4. CVSS scoreCVSS score changed from not recorded to 7.8 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
    Before
    not recorded
    After
    7.8 (CVSS 3.1 · NIST NVD · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
    NIST NVD ↗
  5. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2017-17767↗CVE authority or vendor reference↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
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-2017-8824 · cve.blacktree.nl