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SUSE haproxy Important Buffer Overflow Null Pointer Vuln 2026-22515-1

suse
Calendar Grey July 8, 2026
Dist Suse Esm H88
An important security update for haproxy addresses two vulnerabilities, ensuring stability and protection for SUSE users.
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 Micro 6.0 zypper in -t patch SUSE-SLE-Micro-6.0-781=1 ## Package List: * SUSE Linux Micro 6.0 (aarch64 s390x x86_64) * haproxy-debugsource-2.8.11+git0.01c1056a4-4.1 * haproxy-debuginfo-2.8.11+git0.01c1056a4-4.1 * haproxy-2.8.11+git0.01c1056a4-4.1

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-2026:22515-1
Release Date: 2026-07-03T12:51:57Z
Rating: important

Topics%20covered

Topics Covered

security advisory buffer overflow SuSE important null pointer haproxy

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