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CVE-2026-42009

7.5 high SSVC exploitation: none Modified
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 1

  1. First seenCVSS 7.5 · gnu, redhatNVD modified 2026-10-14 20:17

Affected (CPE criteria) 43

  • cpe:2.3:a:gnu:gnutls:-:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*
  • cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_els:8.10:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_els:8.10:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0_s390x:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:8.10:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0_ppc64le:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:8.10:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux:9.8:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_els:9.8:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_els:9.8:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_eus:9.8:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_eus:9.8:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:9.8:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.8:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_els:9.8:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.8:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_update_services_for_sap_solutions:9.8:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.8:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux:10.2:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux:10.2:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_els:10.2:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_els:10.2:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_eus:10.2:*:*:*:*:*:arm64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_eus:10.2:*:*:*:*:*:x64:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:10.2:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_els:10.2:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:10.2:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:10.0:*:*:*:*:*:*:*
  • and 3 more

References 73