Issue summary: Some non-default TLS server configurations can cause unbounded memory growth when processing TLSv1.3 sessions Impact summary: An attacker may exploit certain server configurations to trigger unbounded memory growth that would lead to a Denial of Service This problem can occur in TLSv1.3 if the non-default SSL_OP_NO_TICKET option is being used (but not if early_data support is also configured and the default anti-replay protection is in use). In this case, under certain conditions, the session cache can get into an incorrect state and it will fail to flush properly as it fills. The session cache will continue to grow in an unbounded manner. A malicious client could deliberately create the scenario for this failure to force a Denial of Service. It may also happen by accident in normal operation. This issue only affects TLS servers supporting TLSv1.3. It does not affect TLS clients. The FIPS modules in 3.2, 3.1 and 3.0 are not affected by this issue. OpenSSL 1.0.2 is also not affected by this issue.
History

Fri, 06 Nov 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Debian
Debian debian Linux
Netapp
Netapp 500f
Netapp 500f Firmware
Netapp a250
Netapp a250 Firmware
Netapp a700s
Netapp a700s Firmware
Netapp active Iq Unified Manager
Netapp bootstrap Os
Netapp c250
Netapp c250 Firmware
Netapp h300s
Netapp h300s Firmware
Netapp h410c
Netapp h410c Firmware
Netapp h410s
Netapp h410s Firmware
Netapp h500s
Netapp h500s Firmware
Netapp h700s
Netapp h700s Firmware
Netapp hci Compute Node
Netapp oncommand Workflow Automation
Netapp ontap 9
Netapp snapmanager
Openssl
Openssl openssl
Siemens
Siemens ruggedcom Rm1224 Lte\(4g\) Eu
Siemens ruggedcom Rm1224 Lte\(4g\) Eu Firmware
Siemens ruggedcom Rm1224 Lte\(4g\) Nam
Siemens ruggedcom Rm1224 Lte\(4g\) Nam Firmware
Siemens ruggedcom Rst2428p
Siemens scalance M804pb
Siemens scalance M804pb Firmware
Siemens scalance M812-1 Adsl-router
Siemens scalance M812-1 Adsl-router Firmware
Siemens scalance M816-1 Adsl-router
Siemens scalance M816-1 Adsl-router Firmware
Siemens scalance M826-2 Shdsl-router
Siemens scalance M826-2 Shdsl-router Firmware
Siemens scalance M874-2
Siemens scalance M874-2 Firmware
Siemens scalance M874-3
Siemens scalance M874-3 3g-router \(cn\)
Siemens scalance M874-3 3g-router \(cn\) Firmware
Siemens scalance M874-3 Firmware
Siemens scalance M876-3
Siemens scalance M876-3 \(rok\)
Siemens scalance M876-3 \(rok\) Firmware
Siemens scalance M876-3 Firmware
Siemens scalance M876-4
Siemens scalance M876-4 \(eu\)
Siemens scalance M876-4 \(eu\) Firmware
Siemens scalance M876-4 \(nam\)
Siemens scalance M876-4 \(nam\) Firmware
Siemens scalance M876-4 Firmware
Siemens scalance Mum853-1 \(a1\)
Siemens scalance Mum853-1 \(a1\) Firmware
Siemens scalance Mum853-1 \(b1\)
Siemens scalance Mum853-1 \(b1\) Firmware
Siemens scalance Mum853-1 \(eu\)
Siemens scalance Mum853-1 \(eu\) Firmware
Siemens scalance Mum856-1 \(a1\)
Siemens scalance Mum856-1 \(a1\) Firmware
Siemens scalance Mum856-1 \(b1\)
Siemens scalance Mum856-1 \(b1\) Firmware
Siemens scalance Mum856-1 \(cn\)
Siemens scalance Mum856-1 \(cn\) Firmware
Siemens scalance Mum856-1 \(eu\)
Siemens scalance Mum856-1 \(eu\) Firmware
Siemens scalance Mum856-1 \(row\)
Siemens scalance Mum856-1 \(row\) Firmware
Siemens scalance S615 Eec Lan-router
Siemens scalance S615 Eec Lan-router Firmware
Siemens scalance S615 Lan-router
Siemens scalance S615 Lan-router Firmware
Siemens scalance Wab762-1
Siemens scalance Wab762-1 Firmware
Siemens scalance Wam763-1
Siemens scalance Wam763-1 Firmware
Siemens scalance Wam766-1
Siemens scalance Wam766-1 Firmware
Siemens scalance Wub762-1
Siemens scalance Wub762-1 Firmware
Siemens scalance Wub762-1 Ifeatures
Siemens scalance Wub762-1 Ifeatures Firmware
Siemens scalance Wum763-1
Siemens scalance Wum763-1 Firmware
Siemens scalance Wum766-1
Siemens scalance Wum766-1 Firmware
Siemens scalance Xcm323
Siemens scalance Xcm324
Siemens scalance Xcm328
Siemens scalance Xcm332
Siemens scalance Xrh334
Siemens scalance Xrm334
Siemens simatic S7-1500 Cpu 1518-4 Pn\/dp Firmware
Siemens simatic S7-1500 Cpu 1518-4 Pn\/dp Mfp
Siemens simatic S7-1500 Tm Mfp
Siemens simatic S7-1500 Tm Mfp Firmware
Siemens sinec Ins
Siemens sinec Os
CPEs cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:ontap_9:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:snapmanager:-:*:*:*:*:hyper-v:*:*
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:-:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:sp1:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:sp2:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:sp2_update_1:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_ins:1.0:sp2_update_2:*:*:*:*:*:*
cpe:2.3:h:netapp:500f:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:a250:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:a700s:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:c250:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*
cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:ruggedcom_rm1224_lte\(4g\)_eu:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:ruggedcom_rm1224_lte\(4g\)_nam:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:ruggedcom_rst2428p:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m804pb:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m812-1_adsl-router:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m816-1_adsl-router:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m826-2_shdsl-router:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m874-2:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m874-3:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m874-3_3g-router_\(cn\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m876-3:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m876-3_\(rok\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m876-4:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m876-4_\(eu\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_m876-4_\(nam\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum853-1_\(a1\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum853-1_\(b1\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum853-1_\(eu\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum856-1_\(a1\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum856-1_\(b1\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum856-1_\(cn\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum856-1_\(eu\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_mum856-1_\(row\):-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_s615_eec_lan-router:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_s615_lan-router:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wab762-1:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wam763-1:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wam766-1:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wub762-1:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wub762-1_ifeatures:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wum763-1:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_wum766-1:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_xcm323:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_xcm324:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_xcm328:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_xcm332:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_xrh334:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:scalance_xrm334:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_mfp:-:*:*:*:*:*:*:*
cpe:2.3:h:siemens:simatic_s7-1500_tm_mfp:-:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:netapp:500f_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:a250_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:a700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:c250_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_rm1224_lte\(4g\)_eu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_rm1224_lte\(4g\)_nam_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m804pb_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m812-1_adsl-router_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m816-1_adsl-router_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m826-2_shdsl-router_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m874-2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m874-3_3g-router_\(cn\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m874-3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m876-3_\(rok\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m876-3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m876-4_\(eu\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m876-4_\(nam\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_m876-4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum853-1_\(a1\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum853-1_\(b1\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum853-1_\(eu\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum856-1_\(a1\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum856-1_\(b1\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum856-1_\(cn\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum856-1_\(eu\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_mum856-1_\(row\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_s615_eec_lan-router_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_s615_lan-router_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wab762-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wam763-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wam766-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wub762-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wub762-1_ifeatures_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wum763-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:scalance_wum766-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:simatic_s7-1500_tm_mfp_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sinec_os:*:*:*:*:*:*:*:*
Vendors & Products Debian
Debian debian Linux
Netapp
Netapp 500f
Netapp 500f Firmware
Netapp a250
Netapp a250 Firmware
Netapp a700s
Netapp a700s Firmware
Netapp active Iq Unified Manager
Netapp bootstrap Os
Netapp c250
Netapp c250 Firmware
Netapp h300s
Netapp h300s Firmware
Netapp h410c
Netapp h410c Firmware
Netapp h410s
Netapp h410s Firmware
Netapp h500s
Netapp h500s Firmware
Netapp h700s
Netapp h700s Firmware
Netapp hci Compute Node
Netapp oncommand Workflow Automation
Netapp ontap 9
Netapp snapmanager
Openssl
Openssl openssl
Siemens
Siemens ruggedcom Rm1224 Lte\(4g\) Eu
Siemens ruggedcom Rm1224 Lte\(4g\) Eu Firmware
Siemens ruggedcom Rm1224 Lte\(4g\) Nam
Siemens ruggedcom Rm1224 Lte\(4g\) Nam Firmware
Siemens ruggedcom Rst2428p
Siemens scalance M804pb
Siemens scalance M804pb Firmware
Siemens scalance M812-1 Adsl-router
Siemens scalance M812-1 Adsl-router Firmware
Siemens scalance M816-1 Adsl-router
Siemens scalance M816-1 Adsl-router Firmware
Siemens scalance M826-2 Shdsl-router
Siemens scalance M826-2 Shdsl-router Firmware
Siemens scalance M874-2
Siemens scalance M874-2 Firmware
Siemens scalance M874-3
Siemens scalance M874-3 3g-router \(cn\)
Siemens scalance M874-3 3g-router \(cn\) Firmware
Siemens scalance M874-3 Firmware
Siemens scalance M876-3
Siemens scalance M876-3 \(rok\)
Siemens scalance M876-3 \(rok\) Firmware
Siemens scalance M876-3 Firmware
Siemens scalance M876-4
Siemens scalance M876-4 \(eu\)
Siemens scalance M876-4 \(eu\) Firmware
Siemens scalance M876-4 \(nam\)
Siemens scalance M876-4 \(nam\) Firmware
Siemens scalance M876-4 Firmware
Siemens scalance Mum853-1 \(a1\)
Siemens scalance Mum853-1 \(a1\) Firmware
Siemens scalance Mum853-1 \(b1\)
Siemens scalance Mum853-1 \(b1\) Firmware
Siemens scalance Mum853-1 \(eu\)
Siemens scalance Mum853-1 \(eu\) Firmware
Siemens scalance Mum856-1 \(a1\)
Siemens scalance Mum856-1 \(a1\) Firmware
Siemens scalance Mum856-1 \(b1\)
Siemens scalance Mum856-1 \(b1\) Firmware
Siemens scalance Mum856-1 \(cn\)
Siemens scalance Mum856-1 \(cn\) Firmware
Siemens scalance Mum856-1 \(eu\)
Siemens scalance Mum856-1 \(eu\) Firmware
Siemens scalance Mum856-1 \(row\)
Siemens scalance Mum856-1 \(row\) Firmware
Siemens scalance S615 Eec Lan-router
Siemens scalance S615 Eec Lan-router Firmware
Siemens scalance S615 Lan-router
Siemens scalance S615 Lan-router Firmware
Siemens scalance Wab762-1
Siemens scalance Wab762-1 Firmware
Siemens scalance Wam763-1
Siemens scalance Wam763-1 Firmware
Siemens scalance Wam766-1
Siemens scalance Wam766-1 Firmware
Siemens scalance Wub762-1
Siemens scalance Wub762-1 Firmware
Siemens scalance Wub762-1 Ifeatures
Siemens scalance Wub762-1 Ifeatures Firmware
Siemens scalance Wum763-1
Siemens scalance Wum763-1 Firmware
Siemens scalance Wum766-1
Siemens scalance Wum766-1 Firmware
Siemens scalance Xcm323
Siemens scalance Xcm324
Siemens scalance Xcm328
Siemens scalance Xcm332
Siemens scalance Xrh334
Siemens scalance Xrm334
Siemens simatic S7-1500 Cpu 1518-4 Pn\/dp Firmware
Siemens simatic S7-1500 Cpu 1518-4 Pn\/dp Mfp
Siemens simatic S7-1500 Tm Mfp
Siemens simatic S7-1500 Tm Mfp Firmware
Siemens sinec Ins
Siemens sinec Os

Tue, 12 May 2026 12:30:00 +0000


Mon, 03 Nov 2025 22:30:00 +0000


Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.02023}

epss

{'score': 0.02078}


Fri, 28 Mar 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Fri, 22 Nov 2024 12:00:00 +0000


Wed, 13 Nov 2024 02:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/a:redhat:enterprise_linux:9
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux

Mon, 14 Oct 2024 15:45:00 +0000


Mon, 14 Oct 2024 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Oct 2024 15:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1325

cve-icon MITRE

Status: PUBLISHED

Assigner: openssl

Published: 2024-04-08T13:51:12.349Z

Updated: 2026-10-15T00:25:23.074Z

Reserved: 2024-03-15T15:33:52.037Z

Link: CVE-2024-2511

cve-icon Vulnrichment

Updated: 2025-11-03T21:54:02.419Z

cve-icon NVD

Status : Analyzed

Published: 2024-04-08T14:15:07.660

Modified: 2026-11-06T19:29:12.633

Link: CVE-2024-2511

cve-icon Redhat

Severity : Low

Publid Date: 2024-04-08T00:00:00Z

Links: CVE-2024-2511 - Bugzilla