Red Hat Product Errata RHSA-2026:33126 - Security Advisory Issued: 2026-06-29 Updated: 2026-06-29 RHSA-2026:33126 - 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 8. 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 8 x86_64 Red Hat Enterprise Linux for IBM z Systems 8 s390x Red Hat Enterprise Linux for Power, little endian 8 ppc64le Red Hat Enterprise Linux for ARM 64 8 aarch64 Red Hat CodeReady Linux Builder for x86_64 8 x86_64 Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le Red Hat CodeReady Linux Builder for ARM 64 8 aarch64 Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10 s390x 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 8 SRPM glibc-2.28-251.el8_10.38.src.rpm SHA-256: 757bbd4e794bff0e336e2e73fd0bffb74b2ff3fcd1c8f9d08397087a455110a1 x86_64 compat-libpthread-nonshared-2.28-251.el8_10.38.x86_64.rpm SHA-256: fe5bf1e3b9c9f2f77f8ee086b8e7f0c0a5f668dab84a82def56ed752f5e6e2c3 glibc-2.28-251.el8_10.38.i686.rpm SHA-256: bb68c8e82ddfa026f820234e5cda1c89e41740af7a4963446610f7efb62beb09 glibc-2.28-251.el8_10.38.x86_64.rpm SHA-256: fbb3a5ad8e657f3ea4c5687fc3b0f3d1c5eddb5c6cd1bc45bde0b22795837510 glibc-all-langpacks-2.28-251.el8_10.38.x86_64.rpm SHA-256: 93294d654358bd65049185700ba60c5ce00d9baa1fb975e6c9acb5ccafc7bcdb glibc-all-langpacks-debuginfo-2.28-251.el8_10.38.i686.rpm SHA-256: 00661053ae626589bb1ac526ef64ce035617a40709fc83a474c30c7b48132b96 glibc-all-langpacks-debuginfo-2.28-251.el8_10.38.x86_64.rpm SHA-256: f19f3426a6bbba049cbb6180130c240eaad7a817f86ccdf47f3aed434e756e45 glibc-all-langpacks-debuginfo-2.28-251.el8_10.38.x86_64.rpm SHA-256: 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