Red Hat — Security Activity Report

Enterprise Linux + middleware (RHSA advisories)

Generated Sep 19, 2026Cohort: 9 vendors with ≥10 CVE advisoriesMethodology ↗

CVE Disclosure Volume

Total all-time: 26,844 CVEs with Red Hat advisories. Source: NVD CVE records joined with vendor advisory publish dates.

1,35020221,22220232,39020242,79420253,1402026

Severity Composition

↓ -15.9 pp

37.2% of Red Hat's 26,844 CVEs are CRITICAL or HIGH severity. Industry median: 53.1%. Source: NVD CVSS v3.1.

CRITICAL 1,910 (7.1%)HIGH 8,074 (30.1%)MEDIUM 8,382 (31.2%)LOW 573 (2.1%)NONE 7,873 (29.3%)

CISA KEV Listings

↓ -0.3 pp

41 of 8,656 Red Hat CVEs in the last 3 years are on CISA's Known Exploited Vulnerabilities catalog (0.5%). Industry median: 0.8%.

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

Vendor Patch Velocity

↑ +1.5 days

Median time from CVE disclosure to Red Hat advisory: 10 days (p25 2 days – p75 25 days). Industry median: 9 days.

Sample size: 374 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 Free747 CVEs
  • CWE-476NULL Pointer Dereference555 CVEs
  • CWE-787Out-of-bounds Write413 CVEs
  • CWE-125Out-of-bounds Read390 CVEs
  • CWE-400Uncontrolled Resource Consumption (Denial of Service)341 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 (RHSA, USN, MSRC, GHSA, etc.) — published_at timestamps
  • MITRE CWE taxonomy (cwe.mitre.org) — weakness class mappings

Snapshot generated Sep 19, 2026. Industry medians refresh every 6 hours; raw vendor counts are queried live on each request.

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