Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Fixed packages 7

Vulnerabilities 8

• High 8.6
  CVE-2026-13321

  DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field

  The BIND resolver accepts validly-signed NSEC records where the "Next Domain Name" field points outside the signer's zone. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1,…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• High 7.5
  CVE-2026-11331

  Potential wildcard CNAME RPZ policy bypass

  An attacker who knows (or guesses) that a resolver uses RPZ with wildcard CNAME policies can craft query names long enough to trigger a NAMETOOLONG error condition during RPZ processing. This is not handled correctly and may lead to defeating the RPZ rule. It…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• High 7.5
  CVE-2026-11622

  Potential memory usage beyond configured limits

  A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage c…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• High 7.5
  CVE-2026-11721

  Cache poisoning possible with label count discrepancy, RRSIG, and wildcards

  It is possible for an attacker's zone to respond to a query with an RRSIG that has a smaller number of labels than the zone in which the RRSIG is contained. This causes `named` to produce a wildcard name for a zone that is shorter than the attacker's zone, wh…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• High 7.5
  CVE-2026-12617

  Record ordering based unexpected exit with CNAME or DNAME

  The issue is unexpected program termination based on ordering and/or specific content in responses to queries for CNAME or DNAME, and A records. Specifically, if a client queries for a DNAME and A record below the DNAME to the resolver, and the authoritative …

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• High 7.5
  CVE-2026-13204

  Unexpected exit in certain situations with NSEC and NSEC3 both present

  If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof. This issue affects BIND 9 versions 9.…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• Medium 6.8
  CVE-2026-10723

  Incorrect acceptance of NSEC3 records

  BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through …

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026
• Medium 6.5
  CVE-2026-10822

  Key Record using PRIVATEDNS algorithm may lead to unexpected exit

  If BIND encounters a particular invalid data structure in a DNS record, it will accept the invalid data, and may subsequently abort and exit. BIND will first need to store a DNS record for a key (KEY, DNSKEY, etc.). That key must specify a PRIVATEDNS algorith…

  ISC BIND 9 bind9 bind9 Debian Ubuntu Azure Linux Alpine
  Jul 22, 2026

References

• report
  https://access.redhat.com/security/cve/CVE-2026-11721
• article
  https://access.redhat.com/security/updates/classification/
• article
  https://images.redhat.com/
• report
  https://access.redhat.com/security/cve/CVE-2026-10822
• report
  https://access.redhat.com/security/cve/CVE-2026-10723
• report
  https://access.redhat.com/security/cve/CVE-2026-13204
• report
  https://access.redhat.com/security/cve/CVE-2026-12617
• report
  https://access.redhat.com/security/cve/CVE-2026-11622
• report
  https://access.redhat.com/security/cve/CVE-2026-13321
• report
  https://access.redhat.com/security/cve/CVE-2026-11331
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_54071.json
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504560
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-10723
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-10723
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504598
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-10822
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-10822
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2503721
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11331
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11331
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504298
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11622
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11622
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504338
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-11721
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-11721
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504370
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-12617
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-12617
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504447
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-13204
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-13204
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2504166
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-13321
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-13321