Upstream information
Description
A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), the wrapped-record length read from the wire is validated only against an upper bound. A small wire length (0, 1, or 2) produces an encrypted_buffer_count below the already-consumed encrypted_buffer_offset, causing an unsigned subtraction underflow in sasl_io_read_packet(). PR_Recv is then requested to read approximately 4 GiB into a 1024-byte heap buffer, resulting in a heap buffer overflow with attacker-controlled content. After a successful SASL bind with integrity protection (SSF > 0), a remote authenticated attacker can cause a denial of service or potentially achieve remote code execution. This flaw is distinct from CVE-2026-11774, whose fix only guards against upper-bound overflow.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (Red Hat) | SUSE |
|---|---|---|
| Base Score | 7.5 | 7.5 |
| Vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Network | Network |
| Attack Complexity | High | High |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | High | High |
| Integrity Impact | High | High |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 7.7 |
| Vector | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Network |
| Attack Complexity | High |
| Attack Requirements | None |
| Privileges Required | Low |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | High |
| Vulnerable System Integrity Impact | High |
| Vulnerable System Availability Impact | High |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Liberty Linux 8 |
| Patchnames: RHSA-2026:64791 (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Please note that this evaluation state might be work in progress, incomplete or outdated.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 Module for Server Applications 15 SP7 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP7 | 389-ds | Affected |
| SUSE Linux Enterprise Server 16.0 | 389-ds | Affected |
| SUSE Linux Enterprise Server 16.1 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | 389-ds | Affected |
| openSUSE Leap 16.0 | 389-ds | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP4 | 389-ds | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP5 | 389-ds | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP6 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP4 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP5 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP6 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | 389-ds | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE CaaS Platform 4.0 | 389-ds | Affected |
| SUSE Enterprise Storage 6 | 389-ds | Affected |
| SUSE Enterprise Storage 7 | 389-ds | Affected |
| SUSE Enterprise Storage 7.1 | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | 389-ds | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | 389-ds | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP1 | 389-ds | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP2 | 389-ds | Affected |
| SUSE Linux Enterprise Module for Server Applications 15 SP3 | 389-ds | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | 389-ds | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | 389-ds | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP1 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP2 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP3 | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | 389-ds | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | 389-ds | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | 389-ds | Affected |
| SUSE Manager Proxy 4.0 | 389-ds | Affected |
| SUSE Manager Proxy 4.1 | 389-ds | Affected |
| SUSE Manager Proxy 4.2 | 389-ds | Affected |
| SUSE Manager Proxy 4.3 | 389-ds | Affected |
| SUSE Manager Proxy LTS 4.3 | 389-ds | Affected |
| SUSE Manager Retail Branch Server 4.0 | 389-ds | Affected |
| SUSE Manager Retail Branch Server 4.1 | 389-ds | Affected |
| SUSE Manager Retail Branch Server 4.2 | 389-ds | Affected |
| SUSE Manager Retail Branch Server 4.3 | 389-ds | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | 389-ds | Affected |
| SUSE Manager Server 4.0 | 389-ds | Affected |
| SUSE Manager Server 4.1 | 389-ds | Affected |
| SUSE Manager Server 4.2 | 389-ds | Affected |
| SUSE Manager Server 4.3 | 389-ds | Affected |
| SUSE Manager Server LTS 4.3 | 389-ds | Affected |
| openSUSE Leap 15.3 | 389-ds | Affected |
| openSUSE Leap 15.4 | 389-ds | Affected |
| openSUSE Leap 15.5 | 389-ds | Affected |
| openSUSE Leap 15.6 | 389-ds | Affected |
| Container Status | ||
| suse/389-ds suse/389-ds:3.1 | 389-ds | Affected |
SUSE Timeline for this CVE
CVE page created: Tue Sep 8 16:37:11 2026CVE page last modified: Wed Sep 9 18:32:00 2026