Alerts This Week
Warning Icon 1 1,229
Alerts This Week
Warning Icon 1 1,229

SUSE haproxy Important Integer Overflow Null Pointer 2026-2651-1

suse
Calendar Grey June 26, 2026
Dist Suse Esm H88
Security update addresses two vulnerabilities in haproxy for SUSE distributions, offering essential patches for system safety.
An update that solves two vulnerabilities can now be installed.

Summary

## This update for haproxy fixes the following issues * CVE-2026-55203: integer overflow vulnerability in the fcgi_conn structure's drl field that allows buffer misparse as new FCGI record headers (bsc#1268557). * CVE-2026-55204: null pointer dereference vulnerability in hpack_dht_insert() within src/hpack-tbl.c (bsc#1268558). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Micro 5.5 zypper in -t patch SUSE-SLE-Micro-5.5-2026-2651=1 * SUSE Linux Enterprise Micro for Rancher 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2026-2651=1 * SUSE Linux Enterprise Micro 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2026-2651=1

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE important null pointer haproxy

References

* bsc#1268557

* bsc#1268558

Cross-

* CVE-2026-55203

* CVE-2026-55204

CVSS scores:

* CVE-2026-55203 ( SUSE ): 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

* CVE-2026-55203 ( NVD ): 9.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/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

* CVE-2026-55203 ( NVD ): 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

* CVE-2026-55203 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

* CVE-2026-55204 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-55204 ( NVD ): 8.7

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2651-1
Release Date: 2026-06-26T12:18:44Z
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE important null pointer haproxy

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here