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OpenAdvisories
Critical RHSA-2026:66524 2 CVEs

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

Published Sep 11, 2026 · Updated Oct 20, 2026

Ecosystem: Red Hat

Fixed packages 2

ReleasePackageFixed in
Red Hat · RHEL 6 ELS rhel_els:6 openssl 0:1.0.1e-61.el6_10.1
Red Hat · RHEL 6 ELS rhel_els:6 openssl-static 0:1.0.1e-61.el6_10.1

Vulnerabilities 2

  • Critical 9.1
    CVE-2024-5535 Public exploit

    SSL_select_next_proto buffer overread

    Issue summary: Calling the OpenSSL API function SSL_select_next_proto with an empty supported client protocols buffer may cause a crash or memory contents to be sent to the peer. Impact summary: A buffer overread can have a range of potential consequences suc…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi
  • High 8.8
    CVE-2026-45447 Public exploit

    Heap Use-After-Free in the PKCS7_verify() Function

    Issue summary: A specially crafted PKCS#7 or S/MIME signed message could trigger a use-after-free during PKCS#7 signature verification. Impact summary: A use-after-free may result in process crashes, heap corruption, or potentially remote code execution. When…

    OpenSSL OpenSSL openssl nodejs Debian Ubuntu Azure Linux Alpine Wolfi

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2294581
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2481898
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_66524.json
  • report
    https://access.redhat.com/security/cve/CVE-2024-5535
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2024-5535
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2024-5535
  • article
    https://www.oracle.com/security-alerts/cpuoct2024.html#AppendixMSQL
  • report
    https://access.redhat.com/security/cve/CVE-2026-45447
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-45447
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-45447