Red Hat Security Advisory: microcode_ctl security, bug fix, and enhancement update

Fixed packages 1

Vulnerabilities 2

• High 7.0
  CVE-2025-31936

  Improper handling of overlap between protected memory ranges for some Intel(R) Xeon(R) 6 processors when using Intel(R)…

  intel-microcode intel-microcode Debian Ubuntu
  Aug 11, 2026
• Medium 4.5
  CVE-2025-35973

  Improper handling of values for some Intel(R) Processors within Ring 0: Kernel, Hypervisor and Bare Metal OS may allow …

  intel-microcode intel-microcode intel-ucode Debian Ubuntu Alpine
  Aug 11, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2514104
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2514115
• article
  https://issues.redhat.com/browse/RHEL-260496
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_68011.json
• report
  https://access.redhat.com/security/cve/CVE-2025-31936
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-31936
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-31936
• article
  https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01379.html
• report
  https://access.redhat.com/security/cve/CVE-2025-35973
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-35973
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-35973
• article
  https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01428.html