Upstream information
Description
HAProxy through 3.4.0, fixed in commit 9a6d1fe, contains a null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c that fails to validate the return value of hpack_dht_defrag() when the memory pool is exhausted. An attacker can trigger HPACK dynamic table insertions under memory pressure to dereference a NULL pointer and crash HAProxy worker processes, causing denial of service.SUSE information
Overall state of this security issue: Analysis
This issue is currently rated as having important severity.
| CVSS detail | CNA (VulnCheck) |
|---|---|
| Base Score | 7.5 |
| Vector | 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 Impact | None |
| Integrity Impact | None |
| Availability Impact | High |
| CVSSv3 Version | 3.1 |
| CVSS detail | CNA (VulnCheck) |
|---|---|
| Base Score | 8.7 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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 |
| Attack Vector | Network |
| Attack Complexity | Low |
| Attack Requirements | None |
| Privileges Required | None |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | None |
| Vulnerable System Integrity Impact | None |
| Vulnerable System Availability Impact | High |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
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Please note that this evaluation state might be work in progress, incomplete or outdated.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 High Availability Extension 15 SP7 | haproxy | Analysis |
| SUSE Linux Enterprise High Availability Extension 16.0 | haproxy | Analysis |
| SUSE Linux Enterprise Micro 5.3 | haproxy | Analysis |
| SUSE Linux Enterprise Micro 5.4 | haproxy | Analysis |
| SUSE Linux Enterprise Micro 5.5 | haproxy | Analysis |
| SUSE Linux Enterprise Server 16.1 | haproxy | Analysis |
| SUSE Linux Enterprise Server for SAP applications 16.0 | haproxy | Analysis |
| SUSE Linux Enterprise Server for SAP applications 16.1 | haproxy | Analysis |
| SUSE Linux Micro 6.0 | haproxy | Analysis |
| SUSE Linux Micro 6.1 | haproxy | Analysis |
| SUSE Linux Micro 6.2 | haproxy | Analysis |
| openSUSE Leap 16.0 | haproxy | Analysis |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SUSE Linux Enterprise High Availability Extension 12 SP5 | haproxy | Analysis |
| SUSE Linux Enterprise High Availability Extension 15 SP4 | haproxy | Analysis |
| SUSE Linux Enterprise High Availability Extension 15 SP5 | haproxy | Analysis |
| SUSE Linux Enterprise Server for SAP Applications 12 SP5 | haproxy | Analysis |
| Products past their end of life and not receiving proactive updates anymore. | ||
| SUSE Linux Enterprise High Availability Extension 15 SP6 | haproxy | Analysis |
| openSUSE Leap 15.4 | haproxy | Analysis |
| openSUSE Leap 15.5 | haproxy | Analysis |
| openSUSE Leap 15.6 | haproxy | Analysis |
| openSUSE Leap Micro 5.3 | haproxy | Analysis |
| openSUSE Leap Micro 5.4 | haproxy | Analysis |
| openSUSE Leap Micro 5.5 | haproxy | Analysis |
SUSE Timeline for this CVE
CVE page created: Thu Jun 18 20:07:56 2026CVE page last modified: Fri Jun 19 11:53:47 2026