Red Hat Product Errata RHSA-2026:37395 - Security Advisory Issued: 2026-07-09 Updated: 2026-07-09 RHSA-2026:37395 - 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 6 Extended Lifecycle Support - EXTENSION. 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 Extension 6 x86_64 Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386 Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 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 Server - Extended Life Cycle Support Extension 6 SRPM glibc-2.12-1.212.el6_10.4.src.rpm SHA-256: c7a394be3e5e1e45616f7913c466a32c30608ff208ab64fc0b66bfec5ef2e966 x86_64 glibc-2.12-1.212.el6_10.4.i686.rpm SHA-256: dde90e2151f061f6481b293ed375b7c851f1dc96081f19e1bebce2d26ca67e84 glibc-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: 3b415ad86052c0c09742c03485a89f81152f6053aa1e29f1d21e092512eb55b9 glibc-common-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: ca45b7cc7e233d62fb6c201d97a0b6fdadfca2687142e2ab6f8ce55087192e07 glibc-debuginfo-2.12-1.212.el6_10.4.i686.rpm SHA-256: 900c236fbbc2272ec413ae35edde5fd14265fa82b3f15851e883ad1e9986c5c3 glibc-debuginfo-2.12-1.212.el6_10.4.i686.rpm SHA-256: 900c236fbbc2272ec413ae35edde5fd14265fa82b3f15851e883ad1e9986c5c3 glibc-debuginfo-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: fe9c0a79b60d00bef8073d5c407fe20d1222387418e4c8ba8b240557f1ef5f28 glibc-debuginfo-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: fe9c0a79b60d00bef8073d5c407fe20d1222387418e4c8ba8b240557f1ef5f28 glibc-debuginfo-common-2.12-1.212.el6_10.4.i686.rpm SHA-256: 43089bd844f28ecf359dc978239d7b8fc09487e8db16884e93f12c002eae11bf glibc-debuginfo-common-2.12-1.212.el6_10.4.i686.rpm SHA-256: 43089bd844f28ecf359dc978239d7b8fc09487e8db16884e93f12c002eae11bf glibc-debuginfo-common-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: 5ba9c4f1e819fdc76ab2a222095d17317107f25d6f3c54c21d6c354af8d81344 glibc-debuginfo-common-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: 5ba9c4f1e819fdc76ab2a222095d17317107f25d6f3c54c21d6c354af8d81344 glibc-devel-2.12-1.212.el6_10.4.i686.rpm SHA-256: e8985aedff65c52d4ef3b4b1a3c4c7443029afead4d98a9d109353d029ce49d0 glibc-devel-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: c84a2dc3784b2ad19011f2ffe4d6088421f5bad2e66ec38d206abb4c5ac71f11 glibc-headers-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: 5c35634af038fcce830d6537c572cc4fe3e3a935d235cd78f33af6ae64733aba glibc-static-2.12-1.212.el6_10.4.i686.rpm SHA-256: 9cf9b9db75496c902ebd5c3c417f3eb3b5c0120b786d6c8f33047801817a3640 glibc-static-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: 686d3a1cef88d50c16050fd3cc123d91a6bfa179c955e79d26df60e9fb320f1a glibc-utils-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: 8ac7c4ba0fb20d892b3c72de3b885b4417c261fbafd5cd54ea4748050fb7f282 nscd-2.12-1.212.el6_10.4.x86_64.rpm SHA-256: af9000ae4b511b53aa794376513cb2cf9e570cc78b57e638c90aca7d1ed9f7ac i386 glibc-2.12-1.212.el6_10.4.i686.rpm SHA-256: dde90e2151f061f6481b293ed375b7c851f1dc96081f19e1bebce2d26ca67e84 glibc-common-2.12-1.212.el6_10.4.i686.rpm SHA-256: 3af50045d3ec419342936c39ad5d86356fcb06f565616cb24fc877a77c6d1e69 glibc-debuginfo-2.12-1.212.el6_10.4.i686.rpm SHA-256: 900c236fbbc2272ec413ae35edde5fd14265fa82b3f15851e883ad1e9986c5c3 glibc-debuginfo-2.12-1.212.el6_10.4.i686.rpm SHA-256: 900c236fbbc2272ec413ae35edde5fd14265fa82b3f15851e883ad1e9986c5c3 glibc-debuginfo-common-2.12-1.212.el6_10.4.i686.rpm SHA-256: 43089bd844f28ecf359dc978239d7b8fc09487e8db16884e93f12c002eae11bf glibc-debuginfo-common-2.12-1.212.el6_10.4.i686.rpm SHA-256: 43089bd844f28ecf359dc978239d7b8fc09487e8db16884e93f12c002eae11bf glibc-devel-2.12-1.212.el6_10.4.i686.rpm SHA-256: e8985aedff65c52d4ef3b4b1a3c4c7443029afead4d98a9d109353d029ce49d0 glibc-headers-2.12-1.212.el6_10.4.i686.rpm SHA-256: 5b0ef5cf16077888602219b6984885e6a183faf86f4ab303c7683494dd42c3d0 glibc-static-2.12-1.212.el6_10.4.i686.rpm SHA-256: 9cf9b9db75496c902ebd5c3c417f3eb3b5c0120b786d6c8f33047801817a3640 glibc-utils-2.12-1.212.el6_10.4.i686.rpm SHA-256: 401967272c8a47650a3cfb0f150d296d9e833079e682b36201b0fb46e0318354 nscd-2.12-1.212.el6_10.4.i686.rpm SHA-256: db318b46b42eff62c0cb3ff053b6efa8eb64ef0eccff8047b5a8e47f861ccaa4 Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 SRPM glibc-2.12-1.212.el6_10.4.src.rpm SHA-256: c7a394be3e5e1e45616f7913c466a32c30608ff208ab64fc0b66bfec5ef2e966 s390x glibc-2.12-1.212.el6_10.4.s390.rpm SHA-256: 6f15b4ce74e6b64fbf6df07c4c6b5f824023985ee6c09a3af157e8835da86f2d glibc-2.12-1.212.el6_10.4.s390x.rpm SHA-256: ee1cd3946e9df68ceb50762528b4657405a103387a7e47b117068b043e0d25fc glibc-common-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 8af9950ace59fef990ab86d4470f9974ee0d2ebe9029212f30df10844a75a649 glibc-debuginfo-2.12-1.212.el6_10.4.s390.rpm SHA-256: 01fdee4607ca3db5947f4fbbad98aa9720c7ff370ed2a22c30d6edfe0a1f17ef glibc-debuginfo-2.12-1.212.el6_10.4.s390.rpm SHA-256: 01fdee4607ca3db5947f4fbbad98aa9720c7ff370ed2a22c30d6edfe0a1f17ef glibc-debuginfo-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 3688fa84d6e63372ba4ec245f5abce453b3b7d4ce55f9a122261544869d95173 glibc-debuginfo-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 3688fa84d6e63372ba4ec245f5abce453b3b7d4ce55f9a122261544869d95173 glibc-debuginfo-common-2.12-1.212.el6_10.4.s390.rpm SHA-256: 370c7b605ca021c0b1aecd461c89cb99de2c3426ea5d9a8ce29c2fb524dcfb84 glibc-debuginfo-common-2.12-1.212.el6_10.4.s390.rpm SHA-256: 370c7b605ca021c0b1aecd461c89cb99de2c3426ea5d9a8ce29c2fb524dcfb84 glibc-debuginfo-common-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 76bb74f07b33498040a60f962dc979dadccd893dc9d0ee41bc18b0a8bc26d7fb glibc-debuginfo-common-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 76bb74f07b33498040a60f962dc979dadccd893dc9d0ee41bc18b0a8bc26d7fb glibc-devel-2.12-1.212.el6_10.4.s390.rpm SHA-256: 867d607e930eceddd803f350865763dfce537b2bfa3ae34cf1eb7b3abc794c0e glibc-devel-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 286d1401b976cbc40bfd954fe91ebd8ebafc3c74c5a06b5dcd6b1be914f4db90 glibc-headers-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 99f78017dff1e0f3647a49acfd1ebc8110d3a341b3bc932d80034868ca861c50 glibc-static-2.12-1.212.el6_10.4.s390.rpm SHA-256: 079f4463f4faac3a86602653a77810ce82fa68f76749dc941c4034d2aee298fb glibc-static-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 5789553de9898c292f9680425eb6e5af7ce7741e9f56271405883fb673a2b708 glibc-utils-2.12-1.212.el6_10.4.s390x.rpm SHA-256: 9a47b8168d03b12c5b3c4243d3217b51616dc66d3c4fa7b159e025834e5f3090 nscd-2.12-1.212.el6_10.4.s390x.rpm SHA-256: b0a3591af8826716e578ddb3d047551001390a1d15926d24849248b07ccd0ad8 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .