{
  "cveId": "CVE-2026-4878",
  "url": "https://patchblox.com/security/cve/CVE-2026-4878",
  "summary": "CVE-2026-4878 is fixed in 6 products on 1 platform, first by RHSA-2026:19456, released April 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()",
  "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 \u0060cap_set_file()\u0060 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.",
  "published": "2026-04-06T00:00:00Z",
  "severity": "Moderate",
  "cvss": 7,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "cwe": "Time-of-check Time-of-use (TOCTOU) Race Condition",
  "epss": 0.00209,
  "epssPercentile": 0.11161,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4878",
  "fixes": [
    {
      "platform": "linux",
      "product": "golang-kernel-pub-linux-libs-security-libcap-dev",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.75-7ubuntu2.2",
      "fix": "golang-kernel-pub-linux-libs-security-libcap-dev 1:2.75-7ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-golang-kernel-pub-linux-libs-security-libcap-dev-1-2.75-7ubuntu2.2",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "RHEL 10",
      "fixedVersion": "2.69-7.el10_0.1",
      "fix": "RHSA-2026:19456",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19456",
      "released": "2026-04-06T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "RHEL 8",
      "fixedVersion": "0:2.48-6.el8_10.1",
      "fix": "RHSA-2026:13285",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-13285",
      "released": "2026-05-15T16:01:54Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "RHEL 9",
      "fixedVersion": "0:2.48-10.el9_8.1",
      "fix": "RHSA-2026:19346",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19346",
      "released": "2026-05-15T16:04:04Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "almalinux 10",
      "fixedVersion": "2.69-7.el10_2.1",
      "fix": "ALSA-2026:19130",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19130",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "almalinux 8",
      "fixedVersion": "2.48-6.el8_10.1",
      "fix": "ALSA-2026:13285",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-13285",
      "released": "2026-05-04T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "almalinux 9",
      "fixedVersion": "2.48-10.el9_8.1",
      "fix": "ALSA-2026:19346",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19346",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "ol 10",
      "fixedVersion": "0:2.69-7.el10_1.1",
      "fix": "ELSA-2026-12423",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-12423",
      "released": "2026-04-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "ol 8",
      "fixedVersion": "0:2.48-6.el8_10.1",
      "fix": "ELSA-2026-13285",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-13285",
      "released": "2026-05-05T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "ol 9",
      "fixedVersion": "0:2.48-10.el9_7.1",
      "fix": "ELSA-2026-12441",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-12441",
      "released": "2026-04-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.73-160000.3.1",
      "fix": "OPENSUSE-SU-2026:20613-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20613-1",
      "released": "2026-04-22T10:22:37Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "rocky 10",
      "fixedVersion": "0:2.69-7.el10_1.1",
      "fix": "RLSA-2026:19130",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-19130",
      "released": "2026-05-29T16:03:24Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "rocky 8",
      "fixedVersion": "0:2.48-6.el8_10.1",
      "fix": "RLSA-2026:13285",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-13285",
      "released": "2026-05-06T06:00:43Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "rocky 9",
      "fixedVersion": "0:2.48-10.el9_7.1",
      "fix": "RLSA-2026:19346",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-19346",
      "released": "2026-05-20T00:03:50Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "sles 15.6",
      "fixedVersion": "2.63-150400.3.6.1",
      "fix": "SUSE-SU-2026:1432-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1432-1",
      "released": "2026-04-17T10:12:55Z"
    },
    {
      "platform": "linux",
      "product": "libcap",
      "release": "sles 15.7",
      "fixedVersion": "2.63-150400.3.6.1",
      "fix": "SUSE-SU-2026:1432-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-1432-1",
      "released": "2026-04-17T10:12:55Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.48-6.el8_10.1",
      "fix": "RHSA-2026:13285",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-13285",
      "released": "2026-05-15T16:01:54Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "RHEL 9",
      "fixedVersion": "0:2.48-10.el9_8.1",
      "fix": "RHSA-2026:19346",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19346",
      "released": "2026-05-15T16:04:04Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "almalinux 10",
      "fixedVersion": "2.69-7.el10_2.1",
      "fix": "ALSA-2026:19130",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19130",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "almalinux 8",
      "fixedVersion": "2.48-6.el8_10.1",
      "fix": "ALSA-2026:13285",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-13285",
      "released": "2026-05-04T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "almalinux 9",
      "fixedVersion": "2.48-10.el9_8.1",
      "fix": "ALSA-2026:19346",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19346",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "ol 10",
      "fixedVersion": "0:2.69-7.el10_1.1",
      "fix": "ELSA-2026-12423",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-12423",
      "released": "2026-04-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.48-6.el8_10.1",
      "fix": "ELSA-2026-13285",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-13285",
      "released": "2026-05-05T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap-devel",
      "release": "ol 9",
      "fixedVersion": "0:2.48-10.el9_7.1",
      "fix": "ELSA-2026-12441",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-12441",
      "released": "2026-04-30T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:2.66-4\u002Bdeb12u3",
      "fix": "DEBIAN-CVE-2026-4878",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-4878",
      "released": "2026-04-09T16:16:31Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:2.75-10\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-4878",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-4878",
      "released": "2026-04-09T16:16:31Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Debian 14",
      "fixedVersion": "1:2.78-1",
      "fix": "DEBIAN-CVE-2026-4878",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-4878",
      "released": "2026-04-09T16:16:31Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:2.25-1.2ubuntu0.1~esm2",
      "fix": "libcap2 1:2.25-1.2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcap2-1-2.25-1.2ubuntu0.1-esm2",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:2.32-1ubuntu0.2\u002Besm1",
      "fix": "libcap2 1:2.32-1ubuntu0.2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcap2-1-2.32-1ubuntu0.2-esm1",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.44-1ubuntu0.22.04.3",
      "fix": "libcap2 1:2.44-1ubuntu0.22.04.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcap2-1-2.44-1ubuntu0.22.04.3",
      "released": "2026-04-30T14:06:06Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.66-5ubuntu2.4",
      "fix": "libcap2 1:2.66-5ubuntu2.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcap2-1-2.66-5ubuntu2.4",
      "released": "2026-04-30T14:06:10Z"
    },
    {
      "platform": "linux",
      "product": "libcap2",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.75-7ubuntu2.2",
      "fix": "libcap2 1:2.75-7ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libcap2-1-2.75-7ubuntu2.2",
      "released": "2026-04-30T14:06:15Z"
    },
    {
      "platform": "linux",
      "product": "libcap2-bin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:2.25-1.2ubuntu0.1~esm2",
      "fix": "libcap2-bin 1:2.25-1.2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcap2-bin-1-2.25-1.2ubuntu0.1-esm2",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap2-bin",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:2.32-1ubuntu0.2\u002Besm1",
      "fix": "libcap2-bin 1:2.32-1ubuntu0.2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcap2-bin-1-2.32-1ubuntu0.2-esm1",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libcap2-bin",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.44-1ubuntu0.22.04.3",
      "fix": "libcap2-bin 1:2.44-1ubuntu0.22.04.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcap2-bin-1-2.44-1ubuntu0.22.04.3",
      "released": "2026-04-30T14:06:06Z"
    },
    {
      "platform": "linux",
      "product": "libcap2-bin",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.66-5ubuntu2.4",
      "fix": "libcap2-bin 1:2.66-5ubuntu2.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcap2-bin-1-2.66-5ubuntu2.4",
      "released": "2026-04-30T14:06:10Z"
    },
    {
      "platform": "linux",
      "product": "libcap2-bin",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.75-7ubuntu2.2",
      "fix": "libcap2-bin 1:2.75-7ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libcap2-bin-1-2.75-7ubuntu2.2",
      "released": "2026-04-30T14:06:15Z"
    },
    {
      "platform": "linux",
      "product": "libpam-cap",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:2.25-1.2ubuntu0.1~esm2",
      "fix": "libpam-cap 1:2.25-1.2ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libpam-cap-1-2.25-1.2ubuntu0.1-esm2",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libpam-cap",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1:2.32-1ubuntu0.2\u002Besm1",
      "fix": "libpam-cap 1:2.32-1ubuntu0.2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libpam-cap-1-2.32-1ubuntu0.2-esm1",
      "released": "2026-04-09T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libpam-cap",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:2.44-1ubuntu0.22.04.3",
      "fix": "libpam-cap 1:2.44-1ubuntu0.22.04.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libpam-cap-1-2.44-1ubuntu0.22.04.3",
      "released": "2026-04-30T14:06:06Z"
    },
    {
      "platform": "linux",
      "product": "libpam-cap",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1:2.66-5ubuntu2.4",
      "fix": "libpam-cap 1:2.66-5ubuntu2.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libpam-cap-1-2.66-5ubuntu2.4",
      "released": "2026-04-30T14:06:10Z"
    },
    {
      "platform": "linux",
      "product": "libpam-cap",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "1:2.75-7ubuntu2.2",
      "fix": "libpam-cap 1:2.75-7ubuntu2.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-libpam-cap-1-2.75-7ubuntu2.2",
      "released": "2026-04-30T14:06:15Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}