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SUSE Avails Critical Buffer Overflow and NULL Pointer CVE-2025

Linuxsecurity •LinuxSecurity Advisories • December 16, 2025

## This update for libmicrohttpd fixes the following issues: * CVE-2025-59777: Fixed NULL pointer dereference (bsc#1253177). * CVE-2025-62689: Fixed heap-based buffer overflow(bsc#1253178). ## 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-6.0-531=1 ## Package List: * SUSE Linux Micro 6.0 (aarch64 s390x x86_64) * libmicrohttpd-debugsource-0.9.77-2.1 * libmicrohttpd12-debuginfo-0.9.77-2.1 * libmicrohttpd12-0.9.77-2.1

* bsc#1253177 * bsc#1253178 Cross- * CVE-2025-59777 * CVE-2025-62689 CVSS scores: * CVE-2025-59777 ( SUSE ): 8.7 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 * CVE-2025-59777 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H * CVE-2025-59777 ( NVD ): 8.7 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 * CVE-2025-59777 ( NVD ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H * CVE-2025-62689 ( SUSE ): 8.7 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 Read the Full Advisory

* CVE-2025-59777 ( SUSE ): 8.7

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

* CVE-2025-59777 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2025-59777 ( NVD ): 8.7

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

* CVE-2025-59777 ( NVD ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2025-62689 ( SUSE ): 8.7

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

Read the Full Advisory

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Buffer Overflow and NULL Pointer Vulnerabilities in libmicrohttpd The openSUSE Leap 16.0 and SUSE Linux Micro 6.0 have released updates addressing critical vulnerabilities in libmicrohttpd. These include a heap-based buffer overflow (CVE-2025-62689) and a NULL pointer dereference (CVE-2025-59777), both of which can be exploited through specially crafted packets. Users are advised to apply the patches using recommended installation methods. 2 sources 41

Extracted Entities

CVEs (2)

CVE-2025-59777 CVE-2025-62689

Platforms (1)

SUSE Linux Micro 6.0