BlackTreeCVE Intelligence
← Back to the CVE catalogue
Full vulnerability report · 2018
CVE-2018-5344High confidence

n/a: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

n/a · n/a

7.8HighCVSS 3.0
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.

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.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archivelinux-azure-6.11Affected, 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 record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-gcp-6.11Affected, 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 record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-hwe-6.11Affected, 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 record ↗Source updated 11 Sept 2026
Ubuntu 24.04 LTSnoble · standard archivelinux-lowlatency-hwe-6.11Affected, 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 record ↗Source updated 11 Sept 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 record ↗Source updated 11 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-2018-17123

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

In the Linux kernel through 4.14.13, drivers/block/loop.c mishandles lo_release serialization, which allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact.

What

In the Linux kernel through 4.14.13, drivers/block/loop.c mishandles lo_release serialization, which allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact.

Why

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

How

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

What

In the Linux kernel through 4.14.13, drivers/block/loop.c mishandles lo_release serialization, which allows attackers to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact.

Why

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

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.
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
local access → Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') → 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-362

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'). The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.0: 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-362
A

Official authority intelligence

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

CERT-FR · French · CERTFR-2019-AVI-299Multiples vulnérabilités dans IBM QRadar

ecord?id=CVE-2018-10879 Référence CVE CVE-2018-10881 https://www.cve.org/CVERecord?id=CVE-2018-10881 Référence CVE CVE-2018-10883 https://www.cve.org/CVERecord?id=CVE-2018-10883 Référence CVE CVE-2018-1092 https://www.cve.org/CVERecord?id=CVE-2018-1092 Référence CVE CVE-2018-1094 https://www.cve.org/CVERecord?id=CVE-2018-1094 Référence CVE CVE-2018-13405 https://www.cve.org/CVERecord?id=CVE-2018-13405 Référence CVE CVE-2018-14634 https://www.cve.org/CVERecord?id=CVE-2018-14634 Référence CVE CVE-2018-14646 https://www.cve.org/CVERecord?id=CVE-2018-14646 Référence CVE CVE-2018-17972 https://www.cve.org/CVERecord?id=CVE-2018-17972 Référence CVE CVE-2018-5344 https://www.cve.org/CVERecord?id=CVE-2018-5344 Référence CVE CVE-2018-7740 https://www.cve.org/CVERecord?id=CVE-2018-7740 Référence CVE CVE-2018-9568 https://www.cve.org/CVERecord?id=CVE-2018-9568 Référence CVE CVE-2019-3855 https://www.cve.org/CVERecord?id=CVE-2019-3855 Référence CVE CVE-2019-3856 https://www.cve.org/CVERecord?id=CVE-2019-3856 Référence CVE CVE-2019-3857 https://www.cve.org/CVERecord?id=CVE-2019-3857 Référence CVE CVE-2019-3863 https://www.cve.org/CVERecord?id=CVE-2019-3863 Référence CVE CVE-2019-5953 https://www.cve.org/CVERecord?id=CVE-2019-5953 Référence CVE CVE-2019-6974 https://www.cve.org/CVERecord?id=CVE-2019-6974 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-216Multiples vulnérabilités dans Google Android

.cve.org/CVERecord?id=CVE-2018-3565 Référence CVE CVE-2018-3571 https://www.cve.org/CVERecord?id=CVE-2018-3571 Référence CVE CVE-2018-3572 https://www.cve.org/CVERecord?id=CVE-2018-3572 Référence CVE CVE-2018-3576 https://www.cve.org/CVERecord?id=CVE-2018-3576 Référence CVE CVE-2018-3578 https://www.cve.org/CVERecord?id=CVE-2018-3578 Référence CVE CVE-2018-3579 https://www.cve.org/CVERecord?id=CVE-2018-3579 Référence CVE CVE-2018-3580 https://www.cve.org/CVERecord?id=CVE-2018-3580 Référence CVE CVE-2018-3581 https://www.cve.org/CVERecord?id=CVE-2018-3581 Référence CVE CVE-2018-3582 https://www.cve.org/CVERecord?id=CVE-2018-3582 Référence CVE CVE-2018-5344 https://www.cve.org/CVERecord?id=CVE-2018-5344 Référence CVE CVE-2018-5840 https://www.cve.org/CVERecord?id=CVE-2018-5840 Référence CVE CVE-2018-5841 https://www.cve.org/CVERecord?id=CVE-2018-5841 Référence CVE CVE-2018-5842 https://www.cve.org/CVERecord?id=CVE-2018-5842 Référence CVE CVE-2018-5843 https://www.cve.org/CVERecord?id=CVE-2018-5843 Référence CVE CVE-2018-5844 https://www.cve.org/CVERecord?id=CVE-2018-5844 Référence CVE CVE-2018-5845 https://www.cve.org/CVERecord?id=CVE-2018-5845 Référence CVE CVE-2018-5846 https://www.cve.org/CVERecord?id=CVE-2018-5846 Référence CVE CVE-2018-5847 https://www.cve.org/CVERecord?id=CVE-2018-5847 Ré

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-198Multiples vulnérabilités dans le noyau Linux d'Ubuntu

=CVE-2017-17450 Référence CVE CVE-2017-17741 https://www.cve.org/CVERecord?id=CVE-2017-17741 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-2017-17807 https://www.cve.org/CVERecord?id=CVE-2017-17807 Référence CVE CVE-2018-1000004 https://www.cve.org/CVERecord?id=CVE-2018-1000004 Référence CVE CVE-2018-1000026 https://www.cve.org/CVERecord?id=CVE-2018-1000026 Référence CVE CVE-2018-5332 https://www.cve.org/CVERecord?id=CVE-2018-5332 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 Référence CVE CVE-2018-5750 https://www.cve.org/CVERecord?id=CVE-2018-5750 Référence CVE CVE-2018-7566 https://www.cve.org/CVERecord?id=CVE-2018-7566 Référence CVE CVE-2018-8043 https://www.cve.org/CVERecord?id=CVE-2018-8043 Gestion détaillée du document le 24 avril 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

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-170Multiples vulnérabilités dans le noyau Linux d'Ubuntu

ecord?id=CVE-2017-18075 Référence CVE CVE-2017-18203 https://www.cve.org/CVERecord?id=CVE-2017-18203 Référence CVE CVE-2017-18204 https://www.cve.org/CVERecord?id=CVE-2017-18204 Référence CVE CVE-2017-18208 https://www.cve.org/CVERecord?id=CVE-2017-18208 Référence CVE CVE-2017-5715 https://www.cve.org/CVERecord?id=CVE-2017-5715 Référence CVE CVE-2017-7518 https://www.cve.org/CVERecord?id=CVE-2017-7518 Référence CVE CVE-2018-1000026 https://www.cve.org/CVERecord?id=CVE-2018-1000026 Référence CVE CVE-2018-5332 https://www.cve.org/CVERecord?id=CVE-2018-5332 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 Référence CVE CVE-2018-6927 https://www.cve.org/CVERecord?id=CVE-2018-6927 Référence CVE CVE-2018-7492 https://www.cve.org/CVERecord?id=CVE-2018-7492 Référence CVE CVE-2018-8043 https://www.cve.org/CVERecord?id=CVE-2018-8043 Gestion détaillée du document le 05 avril 2018 Version initiale le 06 avril 2018 Ajout des bulletins de sécurité Ubuntu du 05 avril 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 e

Official advisory ↗
CERT-FR · French · CERTFR-2018-AVI-165Multiples vulnérabilités dans le noyau Linux d'Ubuntu

d?id=CVE-2017-17450 Référence CVE CVE-2017-17741 https://www.cve.org/CVERecord?id=CVE-2017-17741 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-2017-17807 https://www.cve.org/CVERecord?id=CVE-2017-17807 Référence CVE CVE-2017-18204 https://www.cve.org/CVERecord?id=CVE-2017-18204 Référence CVE CVE-2018-1000026 https://www.cve.org/CVERecord?id=CVE-2018-1000026 Référence CVE CVE-2018-5332 https://www.cve.org/CVERecord?id=CVE-2018-5332 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 04 avril 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-094Multiples vulnérabilités dans le noyau Linux d'Ubuntu

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 d'information

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: 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. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 12 Jan 2018 · Last source change 5 Aug 2024, 05:33 UTC · CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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-2018-17123
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 ↗
  1. Vendor guidanceAuthoritative vendor guidance changed from vendor advisory to authoritative remediation link · patch.
    Before
    vendor advisory
    After
    authoritative remediation link · patch
    af854a3a-2127-422b-91ae-364da2661108
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    n/a · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    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.
    CNA
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    af854a3a-2127-422b-91ae-364da2661108
  4. SeveritySeverity changed from Unknown to High.
    Before
    Unknown
    After
    High
    NIST NVD
  5. CVSS scoreCVSS score changed from not recorded to 7.8 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
    Before
    not recorded
    After
    7.8 (CVSS 3.0 · NIST NVD · CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
    NIST NVD
  6. ENISA EUVD mappingEUVD-2018-17123 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2018-17123"}
    ENISA EUVD
  7. Catalogue recordCVE added to the BlackTree catalogue.
    CNA
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-2018-5344 · cve.blacktree.nl