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SUSE Linux Micro 6.1 Low Patch Update Denial of Service Fix 2026-22905-1

suse
Calendar Grey July 27, 2026
Scroller Suse
This SUSE advisory warns about low-risk issues fixed by a critical patch update for users to install immediately.
A SUSE security update addresses three vulnerabilities in SUSE Linux Micro 6.1, including issues that may lead to denial of service and null pointer dereferences.

Summary

## This update for patch fixes the following issues * CVE-2021-45261: Invalid Pointer via another_hunk function (bsc#1194037). * CVE-2026-56288: crafted unified-diff patch file can cause null pointer derefence (bsc#1271167). * CVE-2026-56289: improper validation of hunk line offsets can lead to denial of service (bsc#1271166). ## 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-6.1-635=1 ## Package List: * SUSE Linux Micro 6.1 (aarch64 ppc64le s390x x86_64) * patch-2.7.6-slfo.1.1_2.1 * patch-debuginfo-2.7.6-slfo.1.1_2.1 * patch-debugsource-2.7.6-slfo.1.1_2.1

Topics%20covered

Topics Covered

security advisory denial of service SuSE software fix patch update low

References

* bsc#1194037

* bsc#1271166

* bsc#1271167

Cross-

* CVE-2021-45261

* CVE-2026-56288

* CVE-2026-56289

CVSS scores:

* CVE-2021-45261 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

* CVE-2021-45261 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

* CVE-2026-56288 ( SUSE ): 4.6

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

* CVE-2026-56288 ( SUSE ): 3.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

* CVE-2026-56288 ( NVD ): 4.6

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/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

* CVE-2026-56288 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-56289 ( SUSE ): 4.6

Severity
low
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:22905-1
Release Date: 2026-07-23T11:28:15Z
Rating: low

Topics%20covered

Topics Covered

security advisory denial of service SuSE software fix patch update low

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