Upstream information
Description
libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow vulnerability that allows a malicious SSH server to corrupt heap metadata in any connecting client by sending a packet with a packet_length smaller than the cipher's block size during Encrypt-then-MAC cipher negotiation. In the fullpacket() function in src/transport.c, the ETM path allocates a buffer of packet_length bytes but copies blocksize minus one bytes via memcpy, causing an overflow that on 32-bit glibc writes attacker-controlled bytes into an adjacent chunk's SIZE field, enabling tcache bin confusion, overlapping live objects, and function pointer overwrite during the session handshake before authentication.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | None | None |
| User Interaction | Required | Required |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | High | High |
| Integrity Impact | High | High |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | CNA (VulnCheck) | SUSE |
|---|---|---|
| Base Score | 7.7 | 7.7 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Attack Requirements | None | None |
| Privileges Required | None | None |
| User Interaction | Passive | Passive |
| Vulnerable System Confidentiality Impact | High | High |
| Vulnerable System Integrity Impact | High | High |
| Vulnerable System Availability Impact | High | High |
| Subsequent System Confidentiality Impact | None | None |
| Subsequent System Integrity Impact | None | None |
| Subsequent System Availability Impact | None | None |
| CVSSv4 Version | 4.0 | 4.0 |
SUSE Security Advisories:
- SUSE-SU-2026:23049-1, published 2026-08-10T15:24:14Z
- SUSE-SU-2026:3525-1, published 2026-08-07T13:08:29Z
- SUSE-SU-2026:3526-1, published 2026-08-07T13:09:58Z
- SUSE-SU-2026:3541-1, published 2026-08-10T12:50:14Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| Container suse/sl-micro/6.0/baremetal-os-container:latest Container suse/sl-micro/6.0/kvm-os-container:latest Container suse/sl-micro/6.0/rt-os-container:latest Container suse/sl-micro/6.0/toolbox:latest |
| |
| Container suse/sl-micro/6.0/base-os-container:latest Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE |
| |
| Image SL-Micro Image SL-Micro-Default Image SL-Micro-Default-SelfInstall Image SL-Micro-Default-encrypted Image SL-Micro-Default-qcow |
| |
| Image SLES-SAP-Azure Image SLES-SAP-Azure-3P Image SLES-SAP-BYOS-Azure Image SLES-SAP-BYOS-EC2 Image SLES-SAP-BYOS-GCE Image SLES-SAP-GCE Image SLES-SAPCAL-GCE |
| |
| Image SLES12-SP5-GCE-SAP-BYOS Image SLES12-SP5-GCE-SAP-On-Demand |
| |
| Image SLES15-SP6-SAP Image SLES15-SP6-SAP-BYOS Image SLES15-SP6-SAP-BYOS-GCE Image SLES15-SP6-SAP-GCE Image SLES15-SP6-SAP-Hardened Image SLES15-SP6-SAP-Hardened-BYOS Image SLES15-SP6-SAP-Hardened-BYOS-GCE Image SLES15-SP6-SAP-Hardened-GCE Image SLES15-SP6-SAPCAL Image SLES15-SP6-SAPCAL-GCE Image SLES15-SP7-SAP-BYOS-GCE Image SLES15-SP7-SAP-GCE Image SLES15-SP7-SAP-Hardened-BYOS-GCE Image SLES15-SP7-SAP-Hardened-GCE Image SLES15-SP7-SAPCAL-GCE |
| |
| SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 |
| Patchnames: SUSE-SLE-Module-Basesystem-15-SP7-2026-3541 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-3526 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-3526 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-3526 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-3526 |
| SUSE Linux Enterprise Micro 5.3 |
| Patchnames: SUSE-SLE-Micro-5.3-2026-3526 |
| SUSE Linux Enterprise Micro 5.4 |
| Patchnames: SUSE-SLE-Micro-5.4-2026-3526 |
| SUSE Linux Enterprise Micro 5.5 |
| Patchnames: SUSE-SLE-Micro-5.5-2026-3526 |
| SUSE Linux Enterprise Server 12 SP5-LTSS |
| Patchnames: SUSE-SLE-SERVER-12-SP5-LTSS-2026-3525 |
| SUSE Linux Enterprise Server 15 SP4-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-3526 |
| SUSE Linux Enterprise Server 15 SP5-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-3526 |
| SUSE Linux Enterprise Server 15 SP6-LTSS |
| Patchnames: SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-3541 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 |
| Patchnames: SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-3525 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP4-2026-3526 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP5-2026-3526 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
| Patchnames: SUSE-SLE-Product-SLES_SAP-15-SP6-2026-3541 |
| SUSE Linux Micro 6.2 |
| Patchnames: SUSE-SL-Micro-6.2-1445 |
| SUSE Manager Proxy LTS 4.3 |
| Patchnames: SUSE-SLE-Product-SUSE-Manager-Proxy-4.3-LTS-2026-3526 |
| SUSE Manager Retail Branch Server LTS 4.3 |
| Patchnames: SUSE-SLE-Product-SUSE-Manager-Retail-Branch-Server-4.3-LTS-2026-3526 |
| SUSE Manager Server LTS 4.3 |
| Patchnames: SUSE-SLE-Product-SUSE-Manager-Server-4.3-LTS-2026-3526 |
| openSUSE Leap 16.0 |
| Patchnames: openSUSE-Leap-16.0-1445 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2026-11454 |
List of packages in QA
| Product(s) | Package(s) |
|---|---|
| SUSE Linux Enterprise Server 16.0 |
|
| SUSE Linux Enterprise Server for SAP applications 16.0 |
|
First public cloud image revisions this CVE is fixed in:
- google/sles-15-sp6-sapcal-v20260810-x86-64
- google/sles-15-sp7-sapcal-v20260811-x86-64
- google/sles-16-0-sapcal-v20260810-x86-64
- google/sles-sap-12-sp5-byos-v20260811-x86-64
- google/sles-sap-12-sp5-v20260811-x86-64
- google/sles-sap-15-sp6-byos-v20260810-x86-64
- google/sles-sap-15-sp6-hardened-byos-v20260810-x86-64
- google/sles-sap-15-sp6-hardened-v20260810-x86-64
- google/sles-sap-15-sp6-v20260810-x86-64
- google/sles-sap-15-sp7-byos-v20260811-x86-64
- google/sles-sap-15-sp7-hardened-byos-v20260811-x86-64
- google/sles-sap-15-sp7-hardened-v20260811-x86-64
- google/sles-sap-15-sp7-v20260811-x86-64
- google/sles-sap-16-0-byos-v20260810-x86-64
- google/sles-sap-16-0-v20260810-x86-64
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Desktop 15 SP7 | libssh2_org | Released |
| SUSE Linux Enterprise High Performance Computing 12 | libssh2_org | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | libssh2_org | Released |
| SUSE Linux Enterprise Micro 5.3 | libssh2_org | Released |
| SUSE Linux Enterprise Micro 5.4 | libssh2_org | Released |
| SUSE Linux Enterprise Micro 5.5 | libssh2_org | Released |
| SUSE Linux Enterprise Micro for Rancher 5.3 | libssh2_org | Released |
| SUSE Linux Enterprise Micro for Rancher 5.4 | libssh2_org | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | libssh2_org | Released |
| SUSE Linux Enterprise Server 15 SP7 | libssh2_org | Released |
| SUSE Linux Enterprise Server 16.0 | libssh2_org | In progress |
| SUSE Linux Enterprise Server 16.1 | libssh2_org | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | libssh2_org | Released |
| SUSE Linux Enterprise Server for SAP applications 16.0 | libssh2_org | In progress |
| SUSE Linux Enterprise Server for SAP applications 16.1 | libssh2_org | Released |
| SUSE Linux Micro 6.0 | libssh2_org | Released |
| SUSE Linux Micro 6.1 | libssh2_org | Released |
| SUSE Linux Micro 6.2 | libssh2_org | Released |
| openSUSE Leap 16.0 | libssh2_org | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 12 SP5 | libssh2_org | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libssh2_org | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libssh2_org | Released |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | libssh2_org | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | libssh2_org | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 12 SP5 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | libssh2_org | Released |
| SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security | libssh2_org | Released |
| SUSE Linux Enterprise Server 15 SP4 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libssh2_org | Released |
| SUSE Linux Enterprise Server 15 SP5 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libssh2_org | Released |
| SUSE Linux Enterprise Server 15 SP6 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | libssh2_org | Released |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | libssh2_org | Released |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | libssh2_org | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libssh2_org | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libssh2_org | Released |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | libssh2_org | Released |
| SUSE Manager Proxy 4.3 | libssh2_org | Affected |
| SUSE Manager Proxy LTS 4.3 | libssh2_org | Released |
| SUSE Manager Retail Branch Server 4.3 | libssh2_org | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | libssh2_org | Released |
| SUSE Manager Server 4.3 | libssh2_org | Affected |
| SUSE Manager Server LTS 4.3 | libssh2_org | Released |
| Products past their end of life and not receiving proactive updates anymore. | ||
| HPE Helion OpenStack 8 | libssh2_org | Not affected |
| SUSE CaaS Platform 3.0 | libssh2_org | Not affected |
| SUSE CaaS Platform 4.0 | libssh2_org | Affected |
| SUSE Enterprise Storage 6 | libssh2_org | Affected |
| SUSE Enterprise Storage 7 | libssh2_org | Affected |
| SUSE Enterprise Storage 7.1 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 12 | libssh2_org | Not affected |
| SUSE Linux Enterprise Desktop 12 SP1 | libssh2_org | Not affected |
| SUSE Linux Enterprise Desktop 12 SP2 | libssh2_org | Not affected |
| SUSE Linux Enterprise Desktop 12 SP3 | libssh2_org | Not affected |
| SUSE Linux Enterprise Desktop 12 SP4 | libssh2_org | Not affected |
| SUSE Linux Enterprise Desktop 15 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | libssh2_org | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP1 | libssh2_org | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP2 | libssh2_org | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP3 | libssh2_org | Not affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | libssh2_org | Not affected |
| SUSE Linux Enterprise High Performance Computing 15 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libssh2_org | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libssh2_org | Released |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | libssh2_org | Affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise Micro 5.0 | libssh2_org | Affected |
| SUSE Linux Enterprise Micro 5.1 | libssh2_org | Affected |
| SUSE Linux Enterprise Micro 5.2 | libssh2_org | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 | libssh2_org | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | libssh2_org | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | libssh2_org | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | libssh2_org | Affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | libssh2_org | Not affected |
| SUSE Linux Enterprise Real Time 15 SP2 | libssh2_org | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | libssh2_org | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 12 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP1 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP1-LTSS | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP2 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP3 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12 SP4 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 12-LTSS | libssh2_org | Not affected |
| SUSE Linux Enterprise Server 15 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP1 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP2 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP3 | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise Server 15-LTSS | libssh2_org | Affected |
| SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | libssh2_org | Not affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | libssh2_org | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | libssh2_org | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | libssh2_org | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | libssh2_org | Affected |
| SUSE Linux Enterprise Software Development Kit 12 | libssh2_org | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP1 | libssh2_org | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP2 | libssh2_org | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP3 | libssh2_org | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP4 | libssh2_org | Not affected |
| SUSE Linux Enterprise Software Development Kit 12 SP5 | libssh2_org | Affected |
| SUSE Manager Proxy 4.0 | libssh2_org | Affected |
| SUSE Manager Proxy 4.1 | libssh2_org | Affected |
| SUSE Manager Proxy 4.2 | libssh2_org | Affected |
| SUSE Manager Retail Branch Server 4.0 | libssh2_org | Affected |
| SUSE Manager Retail Branch Server 4.1 | libssh2_org | Affected |
| SUSE Manager Retail Branch Server 4.2 | libssh2_org | Affected |
| SUSE Manager Server 4.0 | libssh2_org | Affected |
| SUSE Manager Server 4.1 | libssh2_org | Affected |
| SUSE Manager Server 4.2 | libssh2_org | Affected |
| SUSE OpenStack Cloud 7 | libssh2_org | Not affected |
| SUSE OpenStack Cloud 8 | libssh2_org | Not affected |
| SUSE OpenStack Cloud Crowbar 8 | libssh2_org | Not affected |
| openSUSE Leap 15.3 | libssh2_org | Affected |
| openSUSE Leap 15.4 | libssh2_org | Affected |
| openSUSE Leap 15.5 | libssh2_org | Affected |
| openSUSE Leap 15.6 | libssh2_org | Released |
| openSUSE Leap Micro 5.2 | libssh2_org | Affected |
| openSUSE Leap Micro 5.3 | libssh2_org | Affected |
| openSUSE Leap Micro 5.4 | libssh2_org | Affected |
| openSUSE Leap Micro 5.5 | libssh2_org | Affected |
SUSE Timeline for this CVE
CVE page created: Tue Jul 28 14:41:59 2026CVE page last modified: Thu Aug 20 21:13:32 2026