Red Hat Product Errata RHSA-2026:28253 - Security Advisory Issued: 2026-06-23 Updated: 2026-06-23 RHSA-2026:28253 - Security Advisory Overview Updated Packages Synopsis Low: libtasn1 security update Type/Severity Security Advisory: Low Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for libtasn1 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Low. 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 A library that provides Abstract Syntax Notation One (ASN.1, as specified by the X.680 ITU-T recommendation) parsing and structures management, and Distinguished Encoding Rules (DER, as per X.690) encoding and decoding functions. Security Fix(es): libtasn1: libtasn1: Denial of Service via stack-based buffer overflow in asn1_expend_octet_string (CVE-2025-13151) 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 9 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8 x86_64 Red Hat Enterprise Linux for IBM z Systems 9 s390x Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8 s390x Red Hat Enterprise Linux for Power, little endian 9 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8 ppc64le Red Hat Enterprise Linux for ARM 64 9 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8 aarch64 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8 ppc64le Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8 x86_64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8 s390x Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.8 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.8 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.8 s390x Fixes BZ - 2427698 - CVE-2025-13151 libtasn1: libtasn1: Denial of Service via stack-based buffer overflow in asn1_expend_octet_string CVEs CVE-2025-13151 References https://access.redhat.com/security/updates/classification/#low Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 9 SRPM libtasn1-4.16.0-10.el9_8.src.rpm SHA-256: be5c3a993282ecde81ad5d00dd4e7b2c293e97e47d28709aa0ea7292b80ba610 x86_64 libtasn1-4.16.0-10.el9_8.i686.rpm SHA-256: 1f1b8e48579fb898b367020ac87dbb1d67e63a236dd2a416e97197bd33248d44 libtasn1-4.16.0-10.el9_8.x86_64.rpm SHA-256: f9473f322407f10205b0db98b89cf8f603e9c769e9977250734136df56cbb981 libtasn1-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: 404a710cc6667a38246a76316d70e3e75c1aa8e0f5e3747b7fb6807ef994f360 libtasn1-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: 404a710cc6667a38246a76316d70e3e75c1aa8e0f5e3747b7fb6807ef994f360 libtasn1-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: 39dd14b54cc1cf73a413ea20a99f063594bc34f370dae340f957ef807da29a58 libtasn1-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: 39dd14b54cc1cf73a413ea20a99f063594bc34f370dae340f957ef807da29a58 libtasn1-debugsource-4.16.0-10.el9_8.i686.rpm SHA-256: a979d9ff7d8c9fcefcb2524854d34474caf278f9b19930751faaaf9ed476b2a3 libtasn1-debugsource-4.16.0-10.el9_8.i686.rpm SHA-256: a979d9ff7d8c9fcefcb2524854d34474caf278f9b19930751faaaf9ed476b2a3 libtasn1-debugsource-4.16.0-10.el9_8.x86_64.rpm SHA-256: e60bcfd7e29f337d3908e229e228f0cac14111fd9bc376b8a772dd95468ebca1 libtasn1-debugsource-4.16.0-10.el9_8.x86_64.rpm SHA-256: e60bcfd7e29f337d3908e229e228f0cac14111fd9bc376b8a772dd95468ebca1 libtasn1-devel-4.16.0-10.el9_8.i686.rpm SHA-256: 41d4b689b80bb855b19d252c0afc44ccf338a97da086de2aa53009372eeeb259 libtasn1-devel-4.16.0-10.el9_8.x86_64.rpm SHA-256: af794bf06f7ff9c37bd507cbf08f64e1ea9df9f297ea644008d48bd426b3832b libtasn1-tools-4.16.0-10.el9_8.x86_64.rpm SHA-256: eb3b037d786125fb44340388a85d3277221e9db2bd8231e69ae97acb99d1acec libtasn1-tools-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: ecc6c6560585d87376f4975e1bb333ce836f28bddf444448be718de77685f831 libtasn1-tools-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: ecc6c6560585d87376f4975e1bb333ce836f28bddf444448be718de77685f831 libtasn1-tools-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: b82a6977cebbbe6272f08caf8a0059cf14388f8897a7d2ae75c25f5b8e09d6b0 libtasn1-tools-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: b82a6977cebbbe6272f08caf8a0059cf14388f8897a7d2ae75c25f5b8e09d6b0 Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8 SRPM libtasn1-4.16.0-10.el9_8.src.rpm SHA-256: be5c3a993282ecde81ad5d00dd4e7b2c293e97e47d28709aa0ea7292b80ba610 x86_64 libtasn1-4.16.0-10.el9_8.i686.rpm SHA-256: 1f1b8e48579fb898b367020ac87dbb1d67e63a236dd2a416e97197bd33248d44 libtasn1-4.16.0-10.el9_8.x86_64.rpm SHA-256: f9473f322407f10205b0db98b89cf8f603e9c769e9977250734136df56cbb981 libtasn1-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: 404a710cc6667a38246a76316d70e3e75c1aa8e0f5e3747b7fb6807ef994f360 libtasn1-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: 404a710cc6667a38246a76316d70e3e75c1aa8e0f5e3747b7fb6807ef994f360 libtasn1-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: 39dd14b54cc1cf73a413ea20a99f063594bc34f370dae340f957ef807da29a58 libtasn1-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: 39dd14b54cc1cf73a413ea20a99f063594bc34f370dae340f957ef807da29a58 libtasn1-debugsource-4.16.0-10.el9_8.i686.rpm SHA-256: a979d9ff7d8c9fcefcb2524854d34474caf278f9b19930751faaaf9ed476b2a3 libtasn1-debugsource-4.16.0-10.el9_8.i686.rpm SHA-256: a979d9ff7d8c9fcefcb2524854d34474caf278f9b19930751faaaf9ed476b2a3 libtasn1-debugsource-4.16.0-10.el9_8.x86_64.rpm SHA-256: e60bcfd7e29f337d3908e229e228f0cac14111fd9bc376b8a772dd95468ebca1 libtasn1-debugsource-4.16.0-10.el9_8.x86_64.rpm SHA-256: e60bcfd7e29f337d3908e229e228f0cac14111fd9bc376b8a772dd95468ebca1 libtasn1-devel-4.16.0-10.el9_8.i686.rpm SHA-256: 41d4b689b80bb855b19d252c0afc44ccf338a97da086de2aa53009372eeeb259 libtasn1-devel-4.16.0-10.el9_8.x86_64.rpm SHA-256: af794bf06f7ff9c37bd507cbf08f64e1ea9df9f297ea644008d48bd426b3832b libtasn1-tools-4.16.0-10.el9_8.x86_64.rpm SHA-256: eb3b037d786125fb44340388a85d3277221e9db2bd8231e69ae97acb99d1acec libtasn1-tools-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: ecc6c6560585d87376f4975e1bb333ce836f28bddf444448be718de77685f831 libtasn1-tools-debuginfo-4.16.0-10.el9_8.i686.rpm SHA-256: ecc6c6560585d87376f4975e1bb333ce836f28bddf444448be718de77685f831 libtasn1-tools-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: b82a6977cebbbe6272f08caf8a0059cf14388f8897a7d2ae75c25f5b8e09d6b0 libtasn1-tools-debuginfo-4.16.0-10.el9_8.x86_64.rpm SHA-256: b82a6977cebbbe6272f08caf8a0059cf14388f8897a7d2ae75c25f5b8e09d6b0 Red Hat Enterprise Linux for IBM z Systems 9 SRPM libtasn1-4.16.0-10.el9_8.src.rpm SHA-256: be5c3a993282ecde81ad5d00dd4e7b2c293e97e47d28709aa0ea7292b80ba610 s390x libtasn1-4.16.0-10.el9_8.s390x.rpm SHA-256: af302cefa6d25b679f160d87f363b7fdf70756465e7ee8b8744fcef23a7d9da5 libtasn1-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 91a508cad76c37693c801241aace371ed1593f6ba5f08b161b85fae9835f5bba libtasn1-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 91a508cad76c37693c801241aace371ed1593f6ba5f08b161b85fae9835f5bba libtasn1-debugsource-4.16.0-10.el9_8.s390x.rpm SHA-256: 147727fe1cd9f1b1c655741479a2334c7bbe7e098d8f76ca090bde5178b932d4 libtasn1-debugsource-4.16.0-10.el9_8.s390x.rpm SHA-256: 147727fe1cd9f1b1c655741479a2334c7bbe7e098d8f76ca090bde5178b932d4 libtasn1-devel-4.16.0-10.el9_8.s390x.rpm SHA-256: e89a21d75c79a70855e55ac857a757608c3a71a75852d9d8f94603bc737bf616 libtasn1-tools-4.16.0-10.el9_8.s390x.rpm SHA-256: fe0578d4e5624732ebdb4f3e678b8035a2bbc7d64c8d6a4d1e9ca3f3e239c38c libtasn1-tools-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 5f08d7a8a5ca931f969784b34fcdcad6062c25e0195c74954e540ee93043355e libtasn1-tools-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 5f08d7a8a5ca931f969784b34fcdcad6062c25e0195c74954e540ee93043355e Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8 SRPM libtasn1-4.16.0-10.el9_8.src.rpm SHA-256: be5c3a993282ecde81ad5d00dd4e7b2c293e97e47d28709aa0ea7292b80ba610 s390x libtasn1-4.16.0-10.el9_8.s390x.rpm SHA-256: af302cefa6d25b679f160d87f363b7fdf70756465e7ee8b8744fcef23a7d9da5 libtasn1-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 91a508cad76c37693c801241aace371ed1593f6ba5f08b161b85fae9835f5bba libtasn1-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 91a508cad76c37693c801241aace371ed1593f6ba5f08b161b85fae9835f5bba libtasn1-debugsource-4.16.0-10.el9_8.s390x.rpm SHA-256: 147727fe1cd9f1b1c655741479a2334c7bbe7e098d8f76ca090bde5178b932d4 libtasn1-debugsource-4.16.0-10.el9_8.s390x.rpm SHA-256: 147727fe1cd9f1b1c655741479a2334c7bbe7e098d8f76ca090bde5178b932d4 libtasn1-devel-4.16.0-10.el9_8.s390x.rpm SHA-256: e89a21d75c79a70855e55ac857a757608c3a71a75852d9d8f94603bc737bf616 libtasn1-tools-4.16.0-10.el9_8.s390x.rpm SHA-256: fe0578d4e5624732ebdb4f3e678b8035a2bbc7d64c8d6a4d1e9ca3f3e239c38c libtasn1-tools-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 5f08d7a8a5ca931f969784b34fcdcad6062c25e0195c74954e540ee93043355e libtasn1-tools-debuginfo-4.16.0-10.el9_8.s390x.rpm SHA-256: 5f08d7a8a5ca931f969784b34fcdcad6062c25e0195c74954e540ee93043355e Red Hat Enterprise Linux for Power, little endian 9 SRPM libtasn1-4.16.0-10.el9_8.src.rpm SHA-256: be5c3a993282ecde81ad5d00dd4e7b2c293e97e47d28709aa0ea7292b80ba610 ppc64le libtasn1-4.16.0-10.el9_8.ppc64le.rpm SHA-256: cbd7e8b