Security update for libxml2 SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2025:20607-1 Final 1 1 2025-08-27T09:46:23Z current 2025-08-27T09:46:23Z 2025-08-27T09:46:23Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for libxml2 This update for libxml2 fixes the following issues: - CVE-2025-6021: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 [bsc#1244580] - CVE-2025-6170: stack buffer overflow may lead to a crash [bsc#1244700] - CVE-2025-7425: Heap Use-After-Free in libxslt caused by atype corruption in xmlAttrPtr [bsc#1246296] - CVE-2025-49794: heap use after free (UAF) can lead to Denial of service (DoS) [bsc#1244554] - CVE-2025-49795: null pointer dereference may lead to Denial of service (DoS) [bsc#1244555] - CVE-2025-49796: type confusion may lead to Denial of service (DoS) [bsc#1244557] The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-SLE-Micro-6.1-236 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ Link for SUSE-SU-2025:20607-1 https://lists.suse.com/pipermail/sle-updates/2025-August/041454.html E-Mail link for SUSE-SU-2025:20607-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1244554 SUSE Bug 1244554 https://bugzilla.suse.com/1244555 SUSE Bug 1244555 https://bugzilla.suse.com/1244557 SUSE Bug 1244557 https://bugzilla.suse.com/1244580 SUSE Bug 1244580 https://bugzilla.suse.com/1244700 SUSE Bug 1244700 https://bugzilla.suse.com/1246296 SUSE Bug 1246296 https://www.suse.com/security/cve/CVE-2025-49794/ SUSE CVE CVE-2025-49794 page https://www.suse.com/security/cve/CVE-2025-49795/ SUSE CVE CVE-2025-49795 page https://www.suse.com/security/cve/CVE-2025-49796/ SUSE CVE CVE-2025-49796 page https://www.suse.com/security/cve/CVE-2025-6021/ SUSE CVE CVE-2025-6021 page https://www.suse.com/security/cve/CVE-2025-6170/ SUSE CVE CVE-2025-6170 page https://www.suse.com/security/cve/CVE-2025-7425/ SUSE CVE CVE-2025-7425 page SUSE Linux Micro 6.1 libxml2-2-2.11.6-slfo.1.1_6.1 libxml2-tools-2.11.6-slfo.1.1_6.1 libxml2-2-2.11.6-slfo.1.1_6.1 as a component of SUSE Linux Micro 6.1 libxml2-tools-2.11.6-slfo.1.1_6.1 as a component of SUSE Linux Micro 6.1 A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors. CVE-2025-49794 SUSE Linux Micro 6.1:libxml2-2-2.11.6-slfo.1.1_6.1 SUSE Linux Micro 6.1:libxml2-tools-2.11.6-slfo.1.1_6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ https://www.suse.com/security/cve/CVE-2025-49794.html CVE-2025-49794 https://bugzilla.suse.com/1244554 SUSE Bug 1244554 A NULL pointer dereference vulnerability was found in libxml2 when processing XPath XML expressions. This flaw allows an attacker to craft a malicious XML input to libxml2, leading to a denial of service. CVE-2025-49795 SUSE Linux Micro 6.1:libxml2-2-2.11.6-slfo.1.1_6.1 SUSE Linux Micro 6.1:libxml2-tools-2.11.6-slfo.1.1_6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ https://www.suse.com/security/cve/CVE-2025-49795.html CVE-2025-49795 https://bugzilla.suse.com/1244555 SUSE Bug 1244555 A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory. CVE-2025-49796 SUSE Linux Micro 6.1:libxml2-2-2.11.6-slfo.1.1_6.1 SUSE Linux Micro 6.1:libxml2-tools-2.11.6-slfo.1.1_6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ https://www.suse.com/security/cve/CVE-2025-49796.html CVE-2025-49796 https://bugzilla.suse.com/1244557 SUSE Bug 1244557 A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input. CVE-2025-6021 SUSE Linux Micro 6.1:libxml2-2-2.11.6-slfo.1.1_6.1 SUSE Linux Micro 6.1:libxml2-tools-2.11.6-slfo.1.1_6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ https://www.suse.com/security/cve/CVE-2025-6021.html CVE-2025-6021 https://bugzilla.suse.com/1244580 SUSE Bug 1244580 A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files. When a user inputs an overly long command, the program does not check the input size properly, which can cause it to crash. This issue might allow attackers to run harmful code in rare configurations without modern protections. CVE-2025-6170 SUSE Linux Micro 6.1:libxml2-2-2.11.6-slfo.1.1_6.1 SUSE Linux Micro 6.1:libxml2-tools-2.11.6-slfo.1.1_6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ https://www.suse.com/security/cve/CVE-2025-6170.html CVE-2025-6170 https://bugzilla.suse.com/1244700 SUSE Bug 1244700 A flaw was found in libxslt where the attribute type, atype, flags are modified in a way that corrupts internal memory management. When XSLT functions, such as the key() process, result in tree fragments, this corruption prevents the proper cleanup of ID attributes. As a result, the system may access freed memory, causing crashes or enabling attackers to trigger heap corruption. CVE-2025-7425 SUSE Linux Micro 6.1:libxml2-2-2.11.6-slfo.1.1_6.1 SUSE Linux Micro 6.1:libxml2-tools-2.11.6-slfo.1.1_6.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2025/suse-su-202520607-1/ https://www.suse.com/security/cve/CVE-2025-7425.html CVE-2025-7425 https://bugzilla.suse.com/1246296 SUSE Bug 1246296