VDB

RHSA-2026:49836

RHSA-2026:49836 PUBLISHED CVSS 7.5 HIGH

A flaw was found in ldns. When applications use ldns as a resolver over User Datagram Protocol (UDP), it fails to properly match the query's destination address and port with the response's source address and port. Additionally, the query ID and question are not matched with the response. This vulnerability allows a remote attacker to perform off-path poisoning attacks, potentially leading to DNS cache poisoning and redirection to malicious resources.

Risk Scores

CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Products

VendorProductVersions
Red Hatpython3-ldns-debuginfo-0:1.8.3-18.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatpython3-ldns-debuginfo-0:1.8.3-18.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10
Red Hatldns-utils-debuginfo-0:1.8.3-18.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatperl-ldns-0:1.8.3-18.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10
Red Hatldns-debugsource-0:1.8.3-18.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-debugsource-0:1.8.3-18.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10
Red Hatldns-debuginfo-0:1.8.3-18.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatperl-ldns-debuginfo-0:1.8.3-18.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-0:1.8.3-18.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatpython3-ldns-0:1.8.3-18.el10_2.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10
Red Hatldns-debugsource-0:1.8.3-18.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-utils-0:1.8.3-18.el10_2.1.s390x as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10
Red Hatldns-0:1.8.3-18.el10_2.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-0:1.8.3-18.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-debuginfo-0:1.8.3-18.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-0:1.8.3-18.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-debuginfo-0:1.8.3-18.el10_2.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatperl-ldns-0:1.8.3-18.el10_2.1.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10
Red Hatldns-0:1.8.3-18.el10_2.1.src as a component of Red Hat Enterprise Linux AppStream (v. 10)1.8.3-18.el10
Red Hatldns-utils-0:1.8.3-18.el10_2.1.ppc64le as a component of Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)1.8.3-18.el10

…and 42 more

Timeline

  • Aug 4, 2026 CVE Published
  • Aug 12, 2026 CVE Updated
  • Aug 12, 2026 Distribution Patch
  • Aug 12, 2026 Distribution Patch
  • Aug 12, 2026 Security Advisory
  • Aug 12, 2026 Security Advisory

References

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