> CVE-2026-4878 [MEDIUM]

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PUBLISHED
2026-04-09 16:16
MODIFIED
2026-04-09 16:16
CVSS_SCORE V3
6.7
EPSS (Prob. Exploit)
0.14%
Top 96.9%
DATA SOURCES:
NVD 🔗 2026-04-09 RED HAT 🔗 2026-04-12 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 MSRC 🔗 2026-11-02

> DESCRIPTION

A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_file()` function. This allows an attacker with write access to a parent directory to redirect file capability updates to an attacker-controlled file. By doing so, capabilities can be injected into or stripped from unintended executables, leading to privilege escalation.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
EXPLOITABILITY
0.8
IMPACT
5.9

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
High (H)
Conditions spécifiques doivent être réunies pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
Required (R)
Nécessite une action utilisateur (clic lien, ouverture fichier, etc.)
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-367

> CWE DETAILED DESCRIPTIONS

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition - The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (C...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (C...
Red Hat Security Advisory: Red Hat build of OpenTelemetry 3.9.3 release
Red Hat build of OpenTelemetry 3.9.3 has been released
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
A Subscription Management tool for finding and reporting Red Hat product usage
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulne...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vuln...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (C...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Co...
Red Hat Security Advisory: Red Hat Update Infrastructure 5.1 security update
The latest release of Red Hat Update Infrastructure. For more details, see the product documentation.
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Co...
Red Hat Security Advisory: Insights proxy Container Image
Initial GA Release of Red Hat Insights proxy
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security h...
Red Hat Security Advisory: libcap security update
An update for libcap is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise...
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda)
Red Hat AI Inference Server Model Optimization Tools 3.2.2 (cuda) is now available.
Red Hat Security Advisory: OpenShift Container Platform 4.19.33 bug fix and security update
Red Hat OpenShift Container Platform release 4.19.33 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.15.65 bug fix and security update
Red Hat OpenShift Container Platform release 4.15.65 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.18.44 bug fix and security update
Red Hat OpenShift Container Platform release 4.18.44 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: OpenShift Container Platform 4.16.64 bug fix and security update
Red Hat OpenShift Container Platform release 4.16.64 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: Cost Management Metrics Operator Update
Cost Management Metrics Operator version 4.4.1 release.
Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage
A Subscription Management tool for finding and reporting Red Hat product usage
Red Hat Security Advisory: OpenShift Container Platform 4.13.68 bug fix and security update
Red Hat OpenShift Container Platform release 4.13.68 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: Red Hat AI Inference Server Model Optimization Tools 3.3.5 (CUDA)
Red Hat AI Inference Server Model Optimization Tools 3.3.5 (CUDA) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (CUDA)
Red Hat AI Inference Server 3.3.5 (CUDA) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (ROCm)
Red Hat AI Inference Server 3.3.5 (ROCm) is now available.
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (Spyre)
Red Hat AI Inference Server 3.3.5 (Spyre) is now available.
Red Hat Security Advisory: OpenShift Container Platform 4.14.68 bug fix and security update
Red Hat OpenShift Container Platform release 4.14.68 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: OpenShift Container Platform 4.17.55 bug fix and security update
Red Hat OpenShift Container Platform release 4.17.55 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red...
Red Hat Security Advisory: Cost Management Metrics Operator Update
Cost Management Metrics Operator version 4.4.2 release.
Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 Technology Preview security update
A new set of Red Hat Update Infrastructure container images is now available as a Technology Preview in the Red Hat container registry.
Red Hat Security Advisory: OpenShift Container Platform 4.12.97 bug fix and security update
Red Hat OpenShift Container Platform release 4.12.97 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red H...
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.20.1
cert-manager Operator for Red Hat OpenShift 1.20.1
Red Hat Security Advisory: Red Hat AI Base Images 3.4.3 (Neuron)
Red Hat AI Base Images 3.4.3 (Neuron) is now available.
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2
cert-manager Operator for Red Hat OpenShift 1.17.2
Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2
cert-manager Operator for Red Hat OpenShift 1.18.2

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> HISTORIQUE DES MODIFICATIONS

Première apparition
09/04/2026 16:16
Source: NVD
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition - The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in...
📊 ENRICHISSEMENT 12/04/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 12/04/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 6 months ago

> REFERENCES

https://access.redhat.com/security/cve/CVE-2026-4878
https://bugzilla.redhat.com/show_bug.cgi?id=2447554
https://bugzilla.redhat.com/show_bug.cgi?id=2451615
http://www.openwall.com/lists/oss-security/2026/04/07/14
http://www.openwall.com/lists/oss-security/2026/04/07/4
http://www.openwall.com/lists/oss-security/2026/04/08/9
http://www.openwall.com/lists/oss-security/2026/04/09/5
http://www.openwall.com/lists/oss-security/2026/04/09/6
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