boxscore/security
CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-4878HIGH
Red Hat Red Hat Enterprise Linux 10 — Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   H   L   N  U  H  H  H    7.0   .0021   11.0     —
AFFECTED
  Product                                                                Versions     Fixed
  Red Hat Enterprise Linux 10                                            unspecified  0:2.69-7.el10_1.1
  Red Hat Enterprise Linux 10                                            unspecified  0:2.69-7.el10_2.1
  Red Hat Enterprise Linux 10.0 Extended Update Support                  unspecified  0:2.69-7.el10_0.1
  Red Hat Enterprise Linux 8                                             unspecified  0:2.48-6.el8_10.1
  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support  unspecified  0:2.48-4.el8_6.1
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On  unspecified  0:2.48-4.el8_6.1
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service         unspecified  0:2.48-5.el8_8.1
  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions         unspecified  0:2.48-5.el8_8.1
  Red Hat Enterprise Linux 9                                             unspecified  0:2.48-10.el9_7.1
  Red Hat Enterprise Linux 9                                             unspecified  0:2.48-10.el9_8.1
  + 37 more
TIMELINE
  Mar 26  Reserved by redhat
  Apr 9   Published (CNA: redhat)
  Aug 17  EXPLOIT PUBLISHED — CVE-2026-4878 (Red Hat Enterprise Linux 10). Public exploit reference added.
  Aug 17  RESCORED — CVE-2026-4878 (Red Hat Enterprise Linux 10). CVSS 6.7 → 7 (NVD).
CWE-367 · CNA: redhat · CVSS v3.1 · 40 references · NVD status: Modified

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.

Lifecycle

Complete event history — 4 events, chronological
DateEventDetail
March 26, 2026ReservedReserved by redhat
April 9, 2026PublishedPublished (CNA: redhat)
August 17, 2026EXPLOIT PUBLISHEDEXPLOIT PUBLISHED — CVE-2026-4878 (Red Hat Enterprise Linux 10). Public exploit reference added.
August 17, 2026RESCOREDRESCORED — CVE-2026-4878 (Red Hat Enterprise Linux 10). CVSS 6.7 → 7 (NVD).

Affected

Affected products and packages — 47 rows
VendorProduct / PackageEcosystemVersion introducedFixed
Red HatRed Hat Enterprise Linux 100:2.69-7.el10_1.1
Red HatRed Hat Enterprise Linux 100:2.69-7.el10_2.1
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:2.69-7.el10_0.1
Red HatRed Hat Enterprise Linux 80:2.48-6.el8_10.1
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:2.48-4.el8_6.1
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:2.48-4.el8_6.1
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:2.48-5.el8_8.1
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:2.48-5.el8_8.1
Red HatRed Hat Enterprise Linux 90:2.48-10.el9_7.1
Red HatRed Hat Enterprise Linux 90:2.48-10.el9_8.1
Red HatRed Hat Enterprise Linux 90:2.48-10.el9_7.1
Red HatRed Hat Enterprise Linux 90:2.48-10.el9_8.1
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:2.48-9.el9_2.1
Red HatRed Hat Enterprise Linux 9.4 Extended Update Support0:2.48-9.el9_4.1
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:2.48-9.el9_6.1
Red HatRed Hat OpenShift Container Platform 4.13413.92.202606160406-0
Red HatRed Hat OpenShift Container Platform 4.14414.92.202606231112-0
Red HatRed Hat OpenShift Container Platform 4.15415.92.202606030318-0
Red HatRed Hat OpenShift Container Platform 4.16416.94.202606051757-0
Red HatRed Hat OpenShift Container Platform 4.17417.94.202606250942-0
Red HatRed Hat OpenShift Container Platform 4.18418.94.202606051320-0
Red HatRed Hat OpenShift Container Platform 4.194.19.9.6.202606031700-0
Red HatCost Management 41780946239
Red HatCost Management 41783539156
Red HatRed Hat AI Inference Server 3.21780681984
Red HatRed Hat AI Inference Server 3.31782352950
Red HatRed Hat AI Inference Server 3.31782352919
Red HatRed Hat AI Inference Server 3.31782353093
Red HatRed Hat AI Inference Server 3.31782352847
Red HatRed Hat Discovery 21778101579
Red HatRed Hat Discovery 21778156756
Red HatRed Hat Discovery 21782159791
Red HatRed Hat Discovery 21782166952
Red HatRed Hat Hardened Images2.78-1.1.hum1
Red HatRed Hat Insights proxy 1.51780420428
Red HatRed Hat OpenShift distributed tracing 3.9.21778056267
Red HatRed Hat OpenShift distributed tracing 3.9.21778056233
Red HatRed Hat OpenShift distributed tracing 3.9.21778056245
Red HatRed Hat Update Infrastructure 51779798159
Red HatRed Hat Update Infrastructure 51779798164
Red HatRed Hat Update Infrastructure 51779798165
Red HatRed Hat Update Infrastructure 51779798222
Red HatRed Hat Enterprise Linux 6
Red HatRed Hat Enterprise Linux 6
Red HatRed Hat Enterprise Linux 7
Red HatRed Hat Enterprise Linux 7
Red HatRed Hat OpenShift Container Platform 4

Weaknesses

CWE-367

References (40)

Related

Authoritative record: CVE-2026-4878 at cve.org

Vendors: red hat

Weaknesses: CWE-367

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-4878 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.