Security update for glibc SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2026:20133-1 Final 1 1 2026-01-29T17:44:57Z current 2026-01-29T17:44:57Z 2026-01-29T17:44:57Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for glibc This update for glibc fixes the following issues: Security fixes: - CVE-2025-0395: Fixed buffer overflow in the assert() function (bsc#1236282). - CVE-2026-0861: Fixed inadequate size check in the memalign suite may result in an integer overflow (bsc#1256766). - CVE-2026-0915: Fixed uninitialized stack buffer used as DNS query name when net==0 in _nss_dns_getnetbyaddr_r (bsc#1256822). - CVE-2025-15281: Fixed uninitialized memory may cause the process abort (bsc#1257005). Other fixes: - NPTL: Optimize trylock for high cache contention workloads (bsc#1256436) The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). openSUSE-Leap-16.0-218 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1236282 SUSE Bug 1236282 https://bugzilla.suse.com/1256436 SUSE Bug 1256436 https://bugzilla.suse.com/1256766 SUSE Bug 1256766 https://bugzilla.suse.com/1256822 SUSE Bug 1256822 https://bugzilla.suse.com/1257005 SUSE Bug 1257005 https://www.suse.com/security/cve/CVE-2025-0395/ SUSE CVE CVE-2025-0395 page https://www.suse.com/security/cve/CVE-2025-15281/ SUSE CVE CVE-2025-15281 page https://www.suse.com/security/cve/CVE-2026-0861/ SUSE CVE CVE-2026-0861 page https://www.suse.com/security/cve/CVE-2026-0915/ SUSE CVE CVE-2026-0915 page openSUSE Leap 16.0 cross-aarch64-glibc-devel-2.40-160000.3.1 cross-ppc64le-glibc-devel-2.40-160000.3.1 cross-riscv64-glibc-devel-2.40-160000.3.1 cross-s390x-glibc-devel-2.40-160000.3.1 glibc-2.40-160000.3.1 glibc-devel-2.40-160000.3.1 glibc-devel-static-2.40-160000.3.1 glibc-extra-2.40-160000.3.1 glibc-gconv-modules-extra-2.40-160000.3.1 glibc-html-2.40-160000.3.1 glibc-i18ndata-2.40-160000.3.1 glibc-info-2.40-160000.3.1 glibc-lang-2.40-160000.3.1 glibc-locale-2.40-160000.3.1 glibc-locale-base-2.40-160000.3.1 glibc-profile-2.40-160000.3.1 glibc-utils-2.40-160000.3.1 cross-aarch64-glibc-devel-2.40-160000.3.1 as a component of openSUSE Leap 16.0 cross-ppc64le-glibc-devel-2.40-160000.3.1 as a component of openSUSE Leap 16.0 cross-riscv64-glibc-devel-2.40-160000.3.1 as a component of openSUSE Leap 16.0 cross-s390x-glibc-devel-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-devel-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-devel-static-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-extra-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-gconv-modules-extra-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-html-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-i18ndata-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-info-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-lang-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-locale-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-locale-base-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-profile-2.40-160000.3.1 as a component of openSUSE Leap 16.0 glibc-utils-2.40-160000.3.1 as a component of openSUSE Leap 16.0 When the assert() function in the GNU C Library versions 2.13 to 2.40 fails, it does not allocate enough space for the assertion failure message string and size information, which may lead to a buffer overflow if the message string size aligns to page size. CVE-2025-0395 openSUSE Leap 16.0:cross-aarch64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-ppc64le-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-riscv64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-s390x-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-static-2.40-160000.3.1 openSUSE Leap 16.0:glibc-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-gconv-modules-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-html-2.40-160000.3.1 openSUSE Leap 16.0:glibc-i18ndata-2.40-160000.3.1 openSUSE Leap 16.0:glibc-info-2.40-160000.3.1 openSUSE Leap 16.0:glibc-lang-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-base-2.40-160000.3.1 openSUSE Leap 16.0:glibc-profile-2.40-160000.3.1 openSUSE Leap 16.0:glibc-utils-2.40-160000.3.1 low To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/security/cve/CVE-2025-0395.html CVE-2025-0395 https://bugzilla.suse.com/1236282 SUSE Bug 1236282 Calling wordexp with WRDE_REUSE in conjunction with WRDE_APPEND in the GNU C Library version 2.0 to version 2.42 may cause the interface to return uninitialized memory in the we_wordv member, which on subsequent calls to wordfree may abort the process. CVE-2025-15281 openSUSE Leap 16.0:cross-aarch64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-ppc64le-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-riscv64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-s390x-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-static-2.40-160000.3.1 openSUSE Leap 16.0:glibc-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-gconv-modules-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-html-2.40-160000.3.1 openSUSE Leap 16.0:glibc-i18ndata-2.40-160000.3.1 openSUSE Leap 16.0:glibc-info-2.40-160000.3.1 openSUSE Leap 16.0:glibc-lang-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-base-2.40-160000.3.1 openSUSE Leap 16.0:glibc-profile-2.40-160000.3.1 openSUSE Leap 16.0:glibc-utils-2.40-160000.3.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/security/cve/CVE-2025-15281.html CVE-2025-15281 https://bugzilla.suse.com/1257005 SUSE Bug 1257005 Passing too large an alignment to the memalign suite of functions (memalign, posix_memalign, aligned_alloc) in the GNU C Library version 2.30 to 2.42 may result in an integer overflow, which could consequently result in a heap corruption. Note that the attacker must have control over both, the size as well as the alignment arguments of the memalign function to be able to exploit this. The size parameter must be close enough to PTRDIFF_MAX so as to overflow size_t along with the large alignment argument. This limits the malicious inputs for the alignment for memalign to the range [1<<62+ 1, 1<<63] and exactly 1<<63 for posix_memalign and aligned_alloc. Typically the alignment argument passed to such functions is a known constrained quantity (e.g. page size, block size, struct sizes) and is not attacker controlled, because of which this may not be easily exploitable in practice. An application bug could potentially result in the input alignment being too large, e.g. due to a different buffer overflow or integer overflow in the application or its dependent libraries, but that is again an uncommon usage pattern given typical sources of alignments. CVE-2026-0861 openSUSE Leap 16.0:cross-aarch64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-ppc64le-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-riscv64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-s390x-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-static-2.40-160000.3.1 openSUSE Leap 16.0:glibc-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-gconv-modules-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-html-2.40-160000.3.1 openSUSE Leap 16.0:glibc-i18ndata-2.40-160000.3.1 openSUSE Leap 16.0:glibc-info-2.40-160000.3.1 openSUSE Leap 16.0:glibc-lang-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-base-2.40-160000.3.1 openSUSE Leap 16.0:glibc-profile-2.40-160000.3.1 openSUSE Leap 16.0:glibc-utils-2.40-160000.3.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/security/cve/CVE-2026-0861.html CVE-2026-0861 https://bugzilla.suse.com/1256766 SUSE Bug 1256766 https://bugzilla.suse.com/1256913 SUSE Bug 1256913 Calling getnetbyaddr or getnetbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend for networks and queries for a zero-valued network in the GNU C Library version 2.0 to version 2.42 can leak stack contents to the configured DNS resolver. CVE-2026-0915 openSUSE Leap 16.0:cross-aarch64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-ppc64le-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-riscv64-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:cross-s390x-glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-2.40-160000.3.1 openSUSE Leap 16.0:glibc-devel-static-2.40-160000.3.1 openSUSE Leap 16.0:glibc-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-gconv-modules-extra-2.40-160000.3.1 openSUSE Leap 16.0:glibc-html-2.40-160000.3.1 openSUSE Leap 16.0:glibc-i18ndata-2.40-160000.3.1 openSUSE Leap 16.0:glibc-info-2.40-160000.3.1 openSUSE Leap 16.0:glibc-lang-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-2.40-160000.3.1 openSUSE Leap 16.0:glibc-locale-base-2.40-160000.3.1 openSUSE Leap 16.0:glibc-profile-2.40-160000.3.1 openSUSE Leap 16.0:glibc-utils-2.40-160000.3.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/security/cve/CVE-2026-0915.html CVE-2026-0915 https://bugzilla.suse.com/1256822 SUSE Bug 1256822