Red Hat — Security Activity Report

Enterprise Linux + middleware (RHSA advisories)

Generated Nov 13, 2026Cohort: 9 vendors with ≥10 CVE advisoriesMethodology ↗

CVE Disclosure Volume

Total all-time: 29,484 CVEs with Red Hat advisories. Source: NVD CVE records joined with vendor advisory publish dates.

1,35020221,22520232,41220242,82020255,7082026

Severity Composition

↓ -15.1 pp

39.8% of Red Hat's 29,484 CVEs are CRITICAL or HIGH severity. Industry median: 54.9%. Source: NVD CVSS v3.1.

CRITICAL 2,293 (7.8%)HIGH 9,450 (32.1%)MEDIUM 9,140 (31.0%)LOW 657 (2.2%)NONE 7,931 (26.9%)

CISA KEV Listings

↓ -0.2 pp

44 of 11,058 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

↓ -3.9 days

Median time from CVE disclosure to Red Hat advisory: 7 days (p25 1 day – p75 23 days). Industry median: 11 days.

Sample size: 619 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 Free1,031 CVEs
  • CWE-476NULL Pointer Dereference608 CVEs
  • CWE-787Out-of-bounds Write545 CVEs
  • CWE-125Out-of-bounds Read538 CVEs
  • CWE-400Uncontrolled Resource Consumption (Denial of Service)484 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 13, 2026: when these counts and industry medians were computed. Vendors in the index are recomputed every 6 hours.

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