CVE record · CVE-2026-4878

Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()

CVSS 6.7 MediumEPSS 0.0020 · 10th percentile

Published by the CVE Program (CNA: redhat) at 9 Apr 2026, 14:49 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.69-7.el10_1.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.69-7.el10_2.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.69-7.el10_0.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-6.el8_10.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-4.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-4.el8_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-5.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-5.el8_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-10.el9_7.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-10.el9_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-10.el9_7.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-10.el9_8.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-9.el9_2.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-9.el9_4.1 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: libcap https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.48-9.el9_6.1 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.12 Package name: openshift/ose-rhel-coreos-8 https://access.redhat.com/downloads/content/package-browser/	unaffected 412.86.202608241157-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.13 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 413.92.202606160406-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.14 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 414.92.202606231112-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.15 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 415.92.202606030318-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.16 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 416.94.202606051757-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.17 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 417.94.202606250942-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.18 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 418.94.202606051320-0 to before * rpm Other versions: affected
Red Hat	Red Hat OpenShift Container Platform 4.19 Package name: openshift/ose-rhel-coreos-9 https://access.redhat.com/downloads/content/package-browser/	unaffected 4.19.9.6.202606031700-0 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.17 Package name: cert-manager/jetstack-cert-manager-acmesolver-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1791371080 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.17 Package name: cert-manager/jetstack-cert-manager-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1791371069 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.17 Package name: cert-manager/cert-manager-operator-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1791788287 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.17 Package name: cert-manager/cert-manager-operator-bundle https://catalog.redhat.com/software/containers/	unaffected 1791970484 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.18 Package name: cert-manager/jetstack-cert-manager-acmesolver-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1791459707 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.18 Package name: cert-manager/jetstack-cert-manager-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1791459711 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.18 Package name: cert-manager/cert-manager-istio-csr-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1791459759 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.18 Package name: cert-manager/cert-manager-operator-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1789029076 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.18 Package name: cert-manager/cert-manager-operator-bundle https://catalog.redhat.com/software/containers/	unaffected 1791966259 to before * rpm Other versions: affected
Red Hat	Cert Manager support for Red Hat OpenShift release 1.20 Package name: cert-manager/cert-manager-trust-manager-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1790598593 to before * rpm Other versions: affected
Red Hat	Cost Management 4 Package name: costmanagement/costmanagement-metrics-rhel9-operator https://catalog.redhat.com/software/containers/	unaffected 1780946239 to before * rpm Other versions: affected
Red Hat	Cost Management 4 Package name: costmanagement/costmanagement-metrics-rhel9-operator https://catalog.redhat.com/software/containers/	unaffected 1783539156 to before * rpm Other versions: affected
Red Hat	Red Hat AI Inference Server 3.2 Package name: rhaiis/model-opt-cuda-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1780681984 to before * rpm Other versions: affected
Red Hat	Red Hat AI Inference Server 3.3 Package name: rhaiis/model-opt-cuda-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1782352950 to before * rpm Other versions: affected
Red Hat	Red Hat AI Inference Server 3.3 Package name: rhaiis/vllm-spyre-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1782352919 to before * rpm Other versions: affected
Red Hat	Red Hat AI Inference Server 3.3 Package name: rhaiis/vllm-rocm-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1782353093 to before * rpm Other versions: affected
Red Hat	Red Hat AI Inference Server 3.3 Package name: rhaiis/vllm-cuda-rhel9 https://catalog.redhat.com/software/containers/	unaffected 1782352847 to before * rpm Other versions: affected

And 22 more products. The full list is on the CVE record.

Identifiers: CVE-2026-4878
CNA: redhat
Weakness (CWE): CWE-367
Tags: Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red Hat Enterprise Linux 9
Race condition
Published: 9 Apr 2026
Updated: 4 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.7	Medium	3.1	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H	CNA (redhat)Used for this record
6.7	Medium	3.1	CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H	ADP (redhat-SADP)

CISA KEV Not listed.
EPSS 0.0020, the 10th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

9 Apr 2026, 14:49 UTC Confirmed by the CVE List
9 Apr 2026, 16:16 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:12423 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:12441 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:13285 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:14162 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:14937 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:19130 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:19346 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:19456 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:19458 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:20595 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21254 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:21275 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:22634 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:22957 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:23233 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:23245 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:24346 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:25044 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:25096 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:25181 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26542 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:27998 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:28887 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:29197 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:30078 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:30087 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:30088 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:30089 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:34098 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:39981 vendor-advisoryredhat

And 15 more on the CVE record.

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.