Red Hat Product Errata RHSA-2026:20594 - Security Advisory Issued: 2026-05-26 Updated: 2026-05-26 RHSA-2026:20594 - 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. 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: Denial of Service via iconv() function with specific character sets (CVE-2026-4046) 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 10 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64 Red Hat Enterprise Linux for IBM z Systems 10 s390x Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x Red Hat Enterprise Linux for Power, little endian 10 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le Red Hat Enterprise Linux for ARM 64 10 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64 Red Hat CodeReady Linux Builder for x86_64 10 x86_64 Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le Red Hat CodeReady Linux Builder for ARM 64 10 aarch64 Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.2 x86_64 Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.2 ppc64le Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.2 s390x Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.2 aarch64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x Fixes BZ - 2453117 - CVE-2026-4046 glibc: glibc: Denial of Service via iconv() function with specific character sets RHEL-159427 - glibc: LD_DEBUG should include a TLS event tracking option [rhel-10] CVEs CVE-2026-4046 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 10 SRPM glibc-2.39-124.el10_2.src.rpm SHA-256: 1a539afa8fdd8372e1fc21b1ca3426da11dde1d2e8c7064e7f5530026c8e89b5 x86_64 glibc-2.39-124.el10_2.x86_64.rpm SHA-256: b4ccc13c00eab35401104815e131991a29153118041c289e3774814670dbc66a glibc-all-langpacks-2.39-124.el10_2.x86_64.rpm SHA-256: dd5726d6245d28b7aebe971f24009f6b8a9ebb0a4bc5d9e4557384e2b83cec34 glibc-benchtests-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: 098d32fcc702b2fd6a94839ec5c12db783d8429dd61c7df6088c24b840f86c08 glibc-benchtests-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: 098d32fcc702b2fd6a94839ec5c12db783d8429dd61c7df6088c24b840f86c08 glibc-common-2.39-124.el10_2.x86_64.rpm SHA-256: aaa881969450b25160dbcd78b3fccab7121d57885c18b374296d9edab64f4685 glibc-common-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: 5686663805f127a205504266c166be515e0ca97db657d02846df1616f67480f5 glibc-common-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: 5686663805f127a205504266c166be515e0ca97db657d02846df1616f67480f5 glibc-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: a694cd4ea883b58ceda60d48f4f4c3397ab5babf7582c1d53b7b9ae813e21fdd glibc-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: a694cd4ea883b58ceda60d48f4f4c3397ab5babf7582c1d53b7b9ae813e21fdd glibc-debugsource-2.39-124.el10_2.x86_64.rpm SHA-256: 5dce6290ac3e1ea8efabb6bf0a804fca469276de31e5c81aff1baf3cf783cd26 glibc-debugsource-2.39-124.el10_2.x86_64.rpm SHA-256: 5dce6290ac3e1ea8efabb6bf0a804fca469276de31e5c81aff1baf3cf783cd26 glibc-devel-2.39-124.el10_2.x86_64.rpm SHA-256: 62d7dda74a4dbe6d4969fa4385c1bbbf958e566b297a8905393995851b2e0c51 glibc-doc-2.39-124.el10_2.noarch.rpm SHA-256: 4202cf960fa1a81886533c29b92ebb72d043ae8584aca9ac82a55ba9b9fb1b03 glibc-gconv-extra-2.39-124.el10_2.x86_64.rpm SHA-256: 599f7c5c8da8f18489e06758c1932419199776e6f21cc24c5a7f61b26fd57b13 glibc-gconv-extra-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: 2a0f615784b357990755bd898433cb1f29ce5feb14a80e8663d24820e59046e2 glibc-gconv-extra-debuginfo-2.39-124.el10_2.x86_64.rpm SHA-256: 2a0f615784b357990755bd898433cb1f29ce5feb14a80e8663d24820e59046e2 glibc-langpack-aa-2.39-124.el10_2.x86_64.rpm SHA-256: 934a961900bda78798453152aafbb990c90127d7b4f818fc6390df018229edbc glibc-langpack-af-2.39-124.el10_2.x86_64.rpm SHA-256: 8d3d7b1c5764006d35baa1547a3a66bccff744c1a5dc605a259e9b0f85ffbba7 glibc-langpack-agr-2.39-124.el10_2.x86_64.rpm SHA-256: 65012e5554a1a7281607819f9dcd9e77ae1d1838be6b3935f5e7b721634c70ce glibc-langpack-ak-2.39-124.el10_2.x86_64.rpm SHA-256: 3912bd36bf7777cf492a29e7d5bf0ddbeed63d469e62e5443a502d9c7035e1f6 glibc-langpack-am-2.39-124.el10_2.x86_64.rpm SHA-256: 3789cfa6d5d362feafe9082b9b79248634e66c23d4ca665b90a04a1e2aa3b2b8 glibc-langpack-an-2.39-124.el10_2.x86_64.rpm SHA-256: 7803de46b853ef84920bea25a20c9256b2d601224e5362479aaf569ccde05307 glibc-langpack-anp-2.39-124.el10_2.x86_64.rpm SHA-256: 539da185a760b23e5810555c06da4e90df7c15fb81d5d1dc3aeab26a81eca62d glibc-langpack-ar-2.39-124.el10_2.x86_64.rpm SHA-256: 36c3c23098f9ee7ca1ec4edde4ff12d7789ced75a963f73854d1ca95d7cf0892 glibc-langpack-as-2.39-124.el10_2.x86_64.rpm SHA-256: f9e432934feae1de6654bdcfa9cf2c837917750ed6e547d721a7f72adad5c0a2 glibc-langpack-ast-2.39-124.el10_2.x86_64.rpm SHA-256: 29435c5b967496cf976911480c582615c65df4d8fe176d7a37eefac3bf25c437 glibc-langpack-ayc-2.39-124.el10_2.x86_64.rpm SHA-256: 20f96ad71a69647693b58aa6bd86035617c8091c0c6de387b8f296f8cdd7c1ce glibc-langpack-az-2.39-124.el10_2.x86_64.rpm SHA-256: ca2830ce72b971a16317c343ae333b50d6593c8c79cadc7367c4ce04c86e554c glibc-langpack-be-2.39-124.el10_2.x86_64.rpm SHA-256: a4a0c18d4e7b2120be9c0912cb6f8156371e4acfde253733536b857fba25e88e glibc-langpack-bem-2.39-124.el10_2.x86_64.rpm SHA-256: 2541652617d9e5a58ca9beca6adbfb4e2ba1ab384695062eac669d57fd83ef90 glibc-langpack-ber-2.39-124.el10_2.x86_64.rpm SHA-256: 3d523273fd3ebe75a3c8d60ec9c630c059dc121c91d72f2c4c84ac0cdc6aa18a glibc-langpack-bg-2.39-124.el10_2.x86_64.rpm SHA-256: 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d28f1596ff882fb21ccca5319a8f2ddbd779a855c3bd7dfbe78614e8bd018e12 glibc-langpack-csb-2.39-124.el10_2.x86_64.rpm SHA-256: d62395d2e8de93fe427247c6b86abe86780325eceb8dab807fb7f63dff849cfe glibc-langpack-cv-2.39-124.el10_2.x86_64.rpm SHA-256: 00940ef02c73faa9dc12c91efb9d5a3a7b6a8953b0739aa6f1f4ca6d7b6d6b8c glibc-langpack-cy-2.39-124.el10_2.x86_64.rpm SHA-256: 63b0e0ed90eb13868cf40fa6fe5626659a50ea620d422c9f52745560bdfaba51 glibc-langpack-da-2.39-124.el10_2.x86_64.rpm SHA-256: a782dfff34b55da028484e5a39bab33eeba39d9155b9acb4e57aa1aed0585143 glibc-langpack-de-2.39-124.el10_2.x86_64.rpm SHA-2