CVE-2026-42009
HIGH EPSS 65.1%
Published May 18, 20261mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
Published May 18, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
65.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-475
Affected Products 44
| Vendor | Product | Version | Range |
|---|---|---|---|
| gnu | gnutls | * | any |
| redhat | hardened_images | * | any |
| redhat | openshift_container_platform | 4.0 | any |
| redhat | enterprise_linux | 6.0 | any |
| redhat | enterprise_linux | 7.0 | any |
| redhat | enterprise_linux | 8.0 | any |
| redhat | enterprise_linux | 8.0 | any |
| redhat | enterprise_linux_for_els | 8.10 | any |
| redhat | enterprise_linux_for_els | 8.10 | any |
| redhat | enterprise_linux_for_ibm_z_systems | 8.0_s390x | any |
| redhat | enterprise_linux_for_ibm_z_systems_els | 8.10 | any |
| redhat | enterprise_linux_for_power_little_endian | 8.0_ppc64le | any |
| redhat | enterprise_linux_for_power_little_endian_els | 8.10 | any |
| redhat | enterprise_linux | 9.0 | any |
| redhat | enterprise_linux | 9.0 | any |
| redhat | enterprise_linux | 9.8 | any |
| redhat | enterprise_linux_for_els | 9.8 | any |
| redhat | enterprise_linux_for_els | 9.8 | any |
| redhat | enterprise_linux_for_eus | 9.8 | any |
| redhat | enterprise_linux_for_eus | 9.8 | any |
| redhat | enterprise_linux_for_ibm_z_systems | 9.0_s390x | any |
| redhat | enterprise_linux_for_ibm_z_systems_els | 9.8 | any |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 9.8 | any |
| redhat | enterprise_linux_for_power_little_endian | 9.0_ppc64le | any |
| redhat | enterprise_linux_for_power_little_endian_els | 9.8 | any |
| redhat | enterprise_linux_for_power_little_endian_eus | 9.8 | any |
| redhat | enterprise_linux_for_update_services_for_sap_solutions | 9.8 | any |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 9.8 | any |
| redhat | enterprise_linux | 10.0 | any |
| redhat | enterprise_linux | 10.0 | any |
| redhat | enterprise_linux | 10.2 | any |
| redhat | enterprise_linux | 10.2 | any |
| redhat | enterprise_linux_for_els | 10.2 | any |
| redhat | enterprise_linux_for_els | 10.2 | any |
| redhat | enterprise_linux_for_eus | 10.2 | any |
| redhat | enterprise_linux_for_eus | 10.2 | any |
| redhat | enterprise_linux_for_ibm_z_systems | 9.0_s390x | any |
| redhat | enterprise_linux_for_ibm_z_systems | 10.2 | any |
| redhat | enterprise_linux_for_ibm_z_systems_els | 10.2 | any |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 10.2 | any |
| redhat | enterprise_linux_for_power_little_endian | 10.0 | any |
| redhat | enterprise_linux_for_power_little_endian | 10.2 | any |
| redhat | enterprise_linux_for_power_little_endian_els | 10.2 | any |
| redhat | enterprise_linux_for_power_little_endian_eus | 10.2 | any |
References 8
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:13274
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:20611
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:20612
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:20613
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:26319
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:26409
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-42009
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2467279
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.