Red Hat — Security Activity Report

Enterprise Linux + middleware (RHSA advisories)

Generated Nov 2, 2026Cohort: 9 vendors with ≥10 CVE advisoriesMethodology ↗

CVE Disclosure Volume

Total all-time: 28,890 CVEs with Red Hat advisories. Source: NVD CVE records joined with vendor advisory publish dates.

1,35020221,22420232,41020242,81720255,1292026

Severity Composition

↓ -14.5 pp

39.3% of Red Hat's 28,890 CVEs are CRITICAL or HIGH severity. Industry median: 53.8%. Source: NVD CVSS v3.1.

CRITICAL 2,239 (7.8%)HIGH 9,126 (31.6%)MEDIUM 8,965 (31.0%)LOW 648 (2.2%)NONE 7,893 (27.3%)

CISA KEV Listings

↓ -0.2 pp

43 of 10,510 Red Hat CVEs in the last 3 years are on CISA's Known Exploited Vulnerabilities catalog (0.4%). Industry median: 0.6%.

Source: CISA Known Exploited Vulnerabilities catalog (current snapshot). KEV listing means CISA observed active in-the-wild exploitation.

Vendor Patch Velocity

↓ -3.5 days

Median time from CVE disclosure to Red Hat advisory: 8 days (p25 4 days – p75 21 days). Industry median: 11 days.

Sample size: 513 CVE→advisory pairs over the last 3 years. Source: vendor advisory published_at minus CVE published.

Top Recurring Weakness Classes

Most-frequently mapped CWEs across Red Hat's last 3 years of CVE disclosures. Source: NVD — CWE mapping per MITRE taxonomy.

  • CWE-416Use After Free953 CVEs
  • CWE-476NULL Pointer Dereference601 CVEs
  • CWE-125Out-of-bounds Read523 CVEs
  • CWE-787Out-of-bounds Write510 CVEs
  • CWE-400Uncontrolled Resource Consumption (Denial of Service)460 CVEs

Recent Security Advisories

Latest advisories published by Red Hat, straight from the vendor's own feed. Severity labels are the vendor's — scales differ across vendors.

Full advisory archive: /pulse/vendor-advisories →

Data sources & corrections

  • NVD National Vulnerability Database (nvd.nist.gov) — CVE records + CVSS v3.1 severity
  • MITRE cvelistV5 (github.com/CVEProject/cvelistV5) — CNA-published CVE timestamps
  • CISA Known Exploited Vulnerabilities catalog (cisa.gov/known-exploited-vulnerabilities-catalog)
  • Vendor security advisories (Red Hat RHSA, Ubuntu USN, Microsoft MSRC, Cisco PSIRT and other per-vendor feeds; the GitHub and OSV advisory databases are not used) — published_at timestamps
  • MITRE CWE taxonomy (cwe.mitre.org) — weakness class mappings

Snapshot generated Nov 2, 2026: when these counts and industry medians were computed. Vendors in the index are recomputed every 6 hours.

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