Vulnerability Details CVE-2026-42009
A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 72.8%
CVSS Severity
CVSS v3 Score 7.5
References
- https://access.redhat.com/errata/RHSA-2026:13274
- https://access.redhat.com/errata/RHSA-2026:20611
- https://access.redhat.com/errata/RHSA-2026:20612
- https://access.redhat.com/errata/RHSA-2026:20613
- https://access.redhat.com/security/cve/CVE-2026-42009
- https://bugzilla.redhat.com/show_bug.cgi?id=2467279
Products affected by CVE-2026-42009
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cpe:2.3:a:gnu:gnutls:-
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cpe:2.3:a:redhat:hardened_images:-
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cpe:2.3:a:redhat:openshift_container_platform:4.0
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cpe:2.3:o:redhat:enterprise_linux:10.0
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cpe:2.3:o:redhat:enterprise_linux:10.2
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cpe:2.3:o:redhat:enterprise_linux:6.0
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cpe:2.3:o:redhat:enterprise_linux:7.0
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cpe:2.3:o:redhat:enterprise_linux:8.0
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cpe:2.3:o:redhat:enterprise_linux:9.0
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cpe:2.3:o:redhat:enterprise_linux:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_els:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_els:8.10
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cpe:2.3:o:redhat:enterprise_linux_for_els:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_eus:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_eus:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0_s390x
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:8.10
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.0
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0_ppc64le
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:8.10
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:10.2
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cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.8
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cpe:2.3:o:redhat:enterprise_linux_for_update_services_for_sap_solutions:9.8
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Redhat » Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions » Version: 9.8cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.8