{
  "fix": "RHSA-2023:5221",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2023-5221",
  "summary": "RHSA-2023:5221, released September 19, 2023, fixes 6 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 4 packages",
  "released": "2023-09-19T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2023-35001, high severity",
  "supported": true,
  "cveCount": 6,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01544,
  "maxCvss": 7.8,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2023:5221",
  "appliesTo": [
    {
      "product": "kpatch-patch-4_18_0-477_10_1",
      "productUrl": "https://patchblox.com/security/product/linux/kpatch-patch-4-18-0-477-10-1",
      "release": "RHEL 8",
      "fixedVersion": "0:1-3.el8_8",
      "supported": true
    },
    {
      "product": "kpatch-patch-4_18_0-477_13_1",
      "productUrl": "https://patchblox.com/security/product/linux/kpatch-patch-4-18-0-477-13-1",
      "release": "RHEL 8",
      "fixedVersion": "0:1-2.el8_8",
      "supported": true
    },
    {
      "product": "kpatch-patch-4_18_0-477_15_1",
      "productUrl": "https://patchblox.com/security/product/linux/kpatch-patch-4-18-0-477-15-1",
      "release": "RHEL 8",
      "fixedVersion": "0:1-2.el8_8",
      "supported": true
    },
    {
      "product": "kpatch-patch-4_18_0-477_21_1",
      "productUrl": "https://patchblox.com/security/product/linux/kpatch-patch-4-18-0-477-21-1",
      "release": "RHEL 8",
      "fixedVersion": "0:1-1.el8_8",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2023-35001",
      "url": "https://patchblox.com/security/cve/CVE-2023-35001",
      "title": "bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: i...",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.01544,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-4004",
      "url": "https://patchblox.com/security/cve/CVE-2023-4004",
      "title": "bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: i...",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00917,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-3390",
      "url": "https://patchblox.com/security/cve/CVE-2023-3390",
      "title": "linux: A use-after-free vulnerability was found in the Linux kernel\u0027s netfilter subsystem in net/netfilter/nf_tables_api.c",
      "priority": "High",
      "severity": "high",
      "cvss": 7.8,
      "epss": 0.00914,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-35788",
      "url": "https://patchblox.com/security/cve/CVE-2023-35788",
      "title": "linux: An issue was discovered in fl_set_geneve_opt in net/sched/cls_flower.c in the Linux kernel before 6.3.7",
      "priority": "High",
      "severity": "high",
      "cvss": 7.8,
      "epss": 0.00524,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-3776",
      "url": "https://patchblox.com/security/cve/CVE-2023-3776",
      "title": "kernel-abi-stablelists: The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: i...",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00508,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-3090",
      "url": "https://patchblox.com/security/cve/CVE-2023-3090",
      "title": "kernel-core: The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: i...",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00479,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}