Red Hat Product Errata RHSA-2026:33170 - Security Advisory Issued: 2026-06-29 Updated: 2026-06-29 RHSA-2026:33170 - Security Advisory Overview Updated Packages Synopsis Moderate: glibc security update Type/Severity Security Advisory: Moderate Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for glibc is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Security Fix(es): glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width (CVE-2026-5450) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64 Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64 Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.0 x86_64 Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.0 ppc64le Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.0 s390x Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.0 aarch64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64 Fixes BZ - 2459853 - CVE-2026-5450 glibc: glibc: Heap Buffer Overflow in `scanf` with `%mc` format specifier and large width CVEs CVE-2026-5450 References https://access.redhat.com/security/updates/classification/#moderate Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 SRPM glibc-2.39-46.el10_0.5.src.rpm SHA-256: 69be65edcd09dd89c25fac632e85bfa40b1ca297a1e11336038db789857b8203 x86_64 glibc-2.39-46.el10_0.5.x86_64.rpm SHA-256: e77704e3949550bfbe81a07ed7cc7f7e1ded9baed4340b9ce9641f7b17f6536f glibc-all-langpacks-2.39-46.el10_0.5.x86_64.rpm SHA-256: 987f3c492d6787ddc5cfa983430d8d9e537ce948a10028c6f9c49a56916b07a8 glibc-benchtests-debuginfo-2.39-46.el10_0.5.x86_64.rpm SHA-256: 5bbebfd23fe35b75253f7b12aae25b7bffba775848a00141da69b4b9626a3973 glibc-benchtests-debuginfo-2.39-46.el10_0.5.x86_64.rpm SHA-256: 5bbebfd23fe35b75253f7b12aae25b7bffba775848a00141da69b4b9626a3973 glibc-common-2.39-46.el10_0.5.x86_64.rpm SHA-256: e226ecbe24ff742251e0edec0dd16a3d9acf423334e3d34b932564341e19cc9d glibc-common-debuginfo-2.39-46.el10_0.5.x86_64.rpm SHA-256: 527c1348c1cf1b1a255a78ed55037f741ee573c841c80489aa4cb60116bdfbae glibc-common-debuginfo-2.39-46.el10_0.5.x86_64.rpm SHA-256: 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