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SUSE haproxy Important Integer Overflow Null Pointer Threat 2026-22663-1

suse
Calendar Grey July 20, 2026
Scroller Suse
An important security update for SUSE addresses critical vulnerabilities in haproxy. Ensure your system is secure and patched.
SUSE has released a security update for haproxy addressing two vulnerabilities, CVE-2026-55203 and CVE-2026-55204, in SUSE Linux Micro 6.1, with significant impact and recommended ...

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 6.1 zypper in -t patch SUSE-SLE-Micro-6.1-609=1 ## Package List: * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64) * haproxy-2.8.11+git0.01c1056a4-slfo.1.1_4.1 * haproxy-debuginfo-2.8.11+git0.01c1056a4-slfo.1.1_4.1

Topics%20covered

Topics Covered

security advisory SuSE important integer overflow 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-2026:22663-1
Release Date: 2026-07-03T12:16:11Z
Rating: important

Topics%20covered

Topics Covered

security advisory SuSE important integer overflow null pointer haproxy

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