Red Hat Product Errata RHSA-2026:34211 - Security Advisory Issued: 2026-07-01 Updated: 2026-07-01 RHSA-2026:34211 - 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 7 Extended Lifecycle 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 Server - Extended Life Cycle Support 7 x86_64 Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64 Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le 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 Server - Extended Life Cycle Support 7 SRPM glibc-2.17-326.el7_9.6.src.rpm SHA-256: 9da4c1510f00083b2dfbb86c866d6b639f858481e723b17d8430583ba0200375 x86_64 glibc-2.17-326.el7_9.6.i686.rpm SHA-256: 18c5aee60e47fdfa535dadf72cdfd26205ba0c61561df5b8f00980567d7f3fed glibc-2.17-326.el7_9.6.x86_64.rpm SHA-256: 70b9cf60158733ee1ef481d1d83dc12d79baac23229bab72c5897e54274a5847 glibc-common-2.17-326.el7_9.6.x86_64.rpm SHA-256: 8690fcb2b01c68e0a6d78f3da1cc01efe61a8727a142d6281ffd3eaf0ae8d794 glibc-debuginfo-2.17-326.el7_9.6.i686.rpm SHA-256: 3c32aac841cbb17393c25087d01a48b6f5f65bbff3631cbf55f3fba0ea3b2fd0 glibc-debuginfo-2.17-326.el7_9.6.i686.rpm SHA-256: 3c32aac841cbb17393c25087d01a48b6f5f65bbff3631cbf55f3fba0ea3b2fd0 glibc-debuginfo-2.17-326.el7_9.6.x86_64.rpm SHA-256: 7e4cf7ef2c7aaa510de8825e13f75d936ff16e1643b751e53b6a44c3e1b4e71e glibc-debuginfo-2.17-326.el7_9.6.x86_64.rpm SHA-256: 7e4cf7ef2c7aaa510de8825e13f75d936ff16e1643b751e53b6a44c3e1b4e71e glibc-debuginfo-common-2.17-326.el7_9.6.i686.rpm SHA-256: c518797e7384b73b51187997374c6db325fcff6be2e4e6a367e017ae4b8d046a glibc-debuginfo-common-2.17-326.el7_9.6.i686.rpm SHA-256: c518797e7384b73b51187997374c6db325fcff6be2e4e6a367e017ae4b8d046a glibc-debuginfo-common-2.17-326.el7_9.6.x86_64.rpm SHA-256: 2787283f138eb56ad71094bacb9e6b6444e886407b990e6641636ca1c7796af3 glibc-debuginfo-common-2.17-326.el7_9.6.x86_64.rpm SHA-256: 2787283f138eb56ad71094bacb9e6b6444e886407b990e6641636ca1c7796af3 glibc-devel-2.17-326.el7_9.6.i686.rpm SHA-256: 0dbba68634cd108a9fd5f14cdd2a2b31cd3ae8332fb50417ab6a2c7f60a96056 glibc-devel-2.17-326.el7_9.6.x86_64.rpm SHA-256: 6b0afc216fdbef4aed5276e424f1c058d502d337c94b8835c787c87016f06e87 glibc-headers-2.17-326.el7_9.6.x86_64.rpm SHA-256: 62771c364b68fe905c445622a6f9bb679d02f1f1b22655418d6f4571029aedfb glibc-static-2.17-326.el7_9.6.i686.rpm SHA-256: 3eb9c7988a5310e9c02183d82ec9354737fc74147f021d67df4dca63b0dea7c9 glibc-static-2.17-326.el7_9.6.x86_64.rpm SHA-256: 069a51978b68d7b33f32c6f936e2f3c2ec07084a3ffe311ee720b6dc3cda270f glibc-utils-2.17-326.el7_9.6.x86_64.rpm SHA-256: 16b0aee2ac9977831f0a59ea93f81371c16e416ab162cfc85ebb3c1f6f5f04bd nscd-2.17-326.el7_9.6.x86_64.rpm SHA-256: 65898121e7fcbd61d873bc01a3eaa3aa7013e877f6b5ec67b021f4123c456792 Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 SRPM glibc-2.17-326.el7_9.6.src.rpm SHA-256: 9da4c1510f00083b2dfbb86c866d6b639f858481e723b17d8430583ba0200375 s390x glibc-2.17-326.el7_9.6.s390.rpm SHA-256: e0db53dd1d8b3112d303d2cc14c01c652b61b8f43b9c1b677211e70662670882 glibc-2.17-326.el7_9.6.s390x.rpm SHA-256: e5b5ddc8fc76f7565c2415ca86fc192b2edb155ecda8e8c05c485c00a03e7af4 glibc-common-2.17-326.el7_9.6.s390x.rpm SHA-256: 7039628aeb032534ed1032d4cea64cd725aec6ad240fcaf44330778d8b0bb1fc glibc-debuginfo-2.17-326.el7_9.6.s390.rpm SHA-256: 17ce244a683533522a6b985db813d777446458857c79511eb8ba9653efb55cf5 glibc-debuginfo-2.17-326.el7_9.6.s390.rpm SHA-256: 17ce244a683533522a6b985db813d777446458857c79511eb8ba9653efb55cf5 glibc-debuginfo-2.17-326.el7_9.6.s390x.rpm SHA-256: eb4c9ab8995db48d37813b7e0e402ee93070e965777ee668b8743e4529d15d5f glibc-debuginfo-2.17-326.el7_9.6.s390x.rpm SHA-256: eb4c9ab8995db48d37813b7e0e402ee93070e965777ee668b8743e4529d15d5f glibc-debuginfo-common-2.17-326.el7_9.6.s390.rpm SHA-256: 5dcd0f0181368a3123c21ecc0c9b97cdf23bf274e23510bf2841a2d619500575 glibc-debuginfo-common-2.17-326.el7_9.6.s390.rpm SHA-256: 5dcd0f0181368a3123c21ecc0c9b97cdf23bf274e23510bf2841a2d619500575 glibc-debuginfo-common-2.17-326.el7_9.6.s390x.rpm SHA-256: f03e1d0a8705e671f55f809addb590bc444a9264cfc4663ae4adcffaf0ff4481 glibc-debuginfo-common-2.17-326.el7_9.6.s390x.rpm SHA-256: f03e1d0a8705e671f55f809addb590bc444a9264cfc4663ae4adcffaf0ff4481 glibc-devel-2.17-326.el7_9.6.s390.rpm SHA-256: 9db5f286b68e2b66f9eaae2d548a0ef683e9b0915f8178db46bada7e3ef05433 glibc-devel-2.17-326.el7_9.6.s390x.rpm SHA-256: 6ac8cb1ac75443f0a0f206c9cf452059eb4ee65660da9f434b99e70980b3de53 glibc-headers-2.17-326.el7_9.6.s390x.rpm SHA-256: 5e3b1bd64c365c4784cb2fc24756311183c01c2fd97ecb702a15ec7dd06e4353 glibc-static-2.17-326.el7_9.6.s390.rpm SHA-256: 44b75a6fbb58aa06c8bae053cd909d114bb7d67d8ee1c7a395de5b0daa936593 glibc-static-2.17-326.el7_9.6.s390x.rpm SHA-256: 48e76115708293688d9adad48957bc98c27ff37335a11ee155c2dea4553e2f18 glibc-utils-2.17-326.el7_9.6.s390x.rpm SHA-256: 773ff75f4253418a2f49a17de99fcbdeb9da5061d8c5a85f500d208c24387a03 nscd-2.17-326.el7_9.6.s390x.rpm SHA-256: 258aac72d31c1d654e1a8ea16519a05075367ed0ab33d53978a07c546021c3d3 Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 SRPM glibc-2.17-326.el7_9.6.src.rpm SHA-256: 9da4c1510f00083b2dfbb86c866d6b639f858481e723b17d8430583ba0200375 ppc64 glibc-2.17-326.el7_9.6.ppc.rpm SHA-256: 477d7f03bfee94ac73e895220f647c1db3a21372c3e7e085401ba2bb04703a4a glibc-2.17-326.el7_9.6.ppc64.rpm SHA-256: 85f50da32eff0742f2753f946f731cb877787e043f6e4fd1e9270260312a188e glibc-common-2.17-326.el7_9.6.ppc64.rpm SHA-256: 105f92496edd742e2efe4b52723db5b641955caadf02ff3f5a44e99009e03c12 glibc-debuginfo-2.17-326.el7_9.6.ppc.rpm SHA-256: 76d1cf4ec54af69b6017f292ec3af08e2103e22354f097430eb7fabc6e5cb781 glibc-debuginfo-2.17-326.el7_9.6.ppc.rpm SHA-256: 76d1cf4ec54af69b6017f292ec3af08e2103e22354f097430eb7fabc6e5cb781 glibc-debuginfo-2.17-326.el7_9.6.ppc64.rpm SHA-256: 5e7a99aad7facec81b42af0c703c855feb4cacb144e748266fe44800012a5250 glibc-debuginfo-2.17-326.el7_9.6.ppc64.rpm SHA-256: 5e7a99aad7facec81b42af0c703c855feb4cacb144e748266fe44800012a5250 glibc-debuginfo-common-2.17-326.el7_9.6.ppc.rpm SHA-256: 5d364735507e6edd57c8f3725a96fd91ec097b8440dc3226c90cbff28651ec7e glibc-debuginfo-common-2.17-326.el7_9.6.ppc.rpm SHA-256: 5d364735507e6edd57c8f3725a96fd91ec097b8440dc3226c90cbff28651ec7e glibc-debuginfo-common-2.17-326.el7_9.6.ppc64.rpm SHA-256: eae3539b6e164c093c1bbd2a8f44d1b10ae000e9dad73474e41196e146f655aa glibc-debuginfo-common-2.17-326.el7_9.6.ppc64.rpm SHA-256: eae3539b6e164c093c1bbd2a8f44d1b10ae000e9dad73474e41196e146f655aa glibc-devel-2.17-326.el7_9.6.ppc.rpm SHA-256: 565f40e1f7ba4440ae4f3f0d3d9b0aba452b0aed45de19290252586432773571 glibc-devel-2.17-326.el7_9.6.ppc64.rpm SHA-256: 63a783fce85c90af445bd3c4091d3e2ab558dfd9e49b84d19e3c511270271895 glibc-headers-2.17-326.el7_9.6.ppc64.rpm SHA-256: c93e7a7a45b38b8f208447adde57f0ca5d57afc6859e3d4e91c94a5c6500f91f glibc-static-2.17-326.el7_9.6.ppc.rpm SHA-256: bb8af073c9bdcfaabe3ab149b43f27bed7568b280778ec2931ab37b570462e60 glibc-static-2.17-326.el7_9.6.ppc64.rpm SHA-256: f79527fa5ef633baf8b57ab0c3aee7f72da2d051a19b60b2e209468be9043905 glibc-utils-2.17-326.el7_9.6.ppc64.rpm SHA-256: f10944cdd697124250c438b52a0ab07e4f89d13c2071ae3c3971b1372c2b30f9 nscd-2.17-326.el7_9.6.ppc64.rpm SHA-256: 6e145422c5f3bd05fce649870b33e13443cfdc3871e7103375db6cf25dad5097 Red Hat Enterprise Linux Server - 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