Red Hat Product Errata RHSA-2026:28235 - Security Advisory Issued: 2026-06-23 Updated: 2026-06-23 RHSA-2026:28235 - 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 10. 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 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 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 - 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 10 SRPM libtasn1-4.20.0-5.el10_2.src.rpm SHA-256: 4de84f4c996d68d0de6469024415e5236ed045a0305db1fc8255a1beec1914d0 x86_64 libtasn1-4.20.0-5.el10_2.x86_64.rpm SHA-256: a796b3ca8327e43b057f9ababd85a47825afc8d81b8b51d0a6cb3d81a77ab345 libtasn1-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: c0cd01bd5ddfeafb4ac46decb2b3adc079cc7a8f9d322eb566e21df4e4495731 libtasn1-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: c0cd01bd5ddfeafb4ac46decb2b3adc079cc7a8f9d322eb566e21df4e4495731 libtasn1-debugsource-4.20.0-5.el10_2.x86_64.rpm SHA-256: 2762b6f52a647ba097baae026b89c3c71ee218634ed6383fd620667cd5690a8d libtasn1-debugsource-4.20.0-5.el10_2.x86_64.rpm SHA-256: 2762b6f52a647ba097baae026b89c3c71ee218634ed6383fd620667cd5690a8d libtasn1-devel-4.20.0-5.el10_2.x86_64.rpm SHA-256: 2dcf61020ba40501580879498b14fd103c5a8cd09467218a041c36482690f8f0 libtasn1-tools-4.20.0-5.el10_2.x86_64.rpm SHA-256: 9c9e7c0fb0f78771097f6643a2e107f332d2b8a6ceef82278eceec0469f9a604 libtasn1-tools-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: 34ed6b35a9726c0fb809f9dd1d01391d5f14b93a7a4a330c34611c6c56f852c5 libtasn1-tools-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: 34ed6b35a9726c0fb809f9dd1d01391d5f14b93a7a4a330c34611c6c56f852c5 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM libtasn1-4.20.0-5.el10_2.src.rpm SHA-256: 4de84f4c996d68d0de6469024415e5236ed045a0305db1fc8255a1beec1914d0 x86_64 libtasn1-4.20.0-5.el10_2.x86_64.rpm SHA-256: a796b3ca8327e43b057f9ababd85a47825afc8d81b8b51d0a6cb3d81a77ab345 libtasn1-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: c0cd01bd5ddfeafb4ac46decb2b3adc079cc7a8f9d322eb566e21df4e4495731 libtasn1-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: c0cd01bd5ddfeafb4ac46decb2b3adc079cc7a8f9d322eb566e21df4e4495731 libtasn1-debugsource-4.20.0-5.el10_2.x86_64.rpm SHA-256: 2762b6f52a647ba097baae026b89c3c71ee218634ed6383fd620667cd5690a8d libtasn1-debugsource-4.20.0-5.el10_2.x86_64.rpm SHA-256: 2762b6f52a647ba097baae026b89c3c71ee218634ed6383fd620667cd5690a8d libtasn1-devel-4.20.0-5.el10_2.x86_64.rpm SHA-256: 2dcf61020ba40501580879498b14fd103c5a8cd09467218a041c36482690f8f0 libtasn1-tools-4.20.0-5.el10_2.x86_64.rpm SHA-256: 9c9e7c0fb0f78771097f6643a2e107f332d2b8a6ceef82278eceec0469f9a604 libtasn1-tools-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: 34ed6b35a9726c0fb809f9dd1d01391d5f14b93a7a4a330c34611c6c56f852c5 libtasn1-tools-debuginfo-4.20.0-5.el10_2.x86_64.rpm SHA-256: 34ed6b35a9726c0fb809f9dd1d01391d5f14b93a7a4a330c34611c6c56f852c5 Red Hat Enterprise Linux for IBM z Systems 10 SRPM libtasn1-4.20.0-5.el10_2.src.rpm SHA-256: 4de84f4c996d68d0de6469024415e5236ed045a0305db1fc8255a1beec1914d0 s390x libtasn1-4.20.0-5.el10_2.s390x.rpm SHA-256: ce0805bfaafe8071804d6d4acf252ec108de47a1e3c029f0e6eaf1c184625121 libtasn1-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: ea2f32157521189a3e750d90f4671884a9309b8791f4f7cf168806e174a96e46 libtasn1-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: ea2f32157521189a3e750d90f4671884a9309b8791f4f7cf168806e174a96e46 libtasn1-debugsource-4.20.0-5.el10_2.s390x.rpm SHA-256: c099c809bb43beec6ff5d3bcb20b7a29625cf6d80b20ea4c41c3d10406fcbace libtasn1-debugsource-4.20.0-5.el10_2.s390x.rpm SHA-256: c099c809bb43beec6ff5d3bcb20b7a29625cf6d80b20ea4c41c3d10406fcbace libtasn1-devel-4.20.0-5.el10_2.s390x.rpm SHA-256: c8fd3d6207fc5a507d9bff24f9649010f7e0fa40facc141f6873ab5c98eca15a libtasn1-tools-4.20.0-5.el10_2.s390x.rpm SHA-256: 3be7758e0440c5b12fcb163120ce746e4eb531afc7f1cf33260335305bccf86d libtasn1-tools-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: 3e0084892f5025422978531bc25043ffc4d892213fb9c541b39813d27edb165b libtasn1-tools-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: 3e0084892f5025422978531bc25043ffc4d892213fb9c541b39813d27edb165b Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 SRPM libtasn1-4.20.0-5.el10_2.src.rpm SHA-256: 4de84f4c996d68d0de6469024415e5236ed045a0305db1fc8255a1beec1914d0 s390x libtasn1-4.20.0-5.el10_2.s390x.rpm SHA-256: ce0805bfaafe8071804d6d4acf252ec108de47a1e3c029f0e6eaf1c184625121 libtasn1-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: ea2f32157521189a3e750d90f4671884a9309b8791f4f7cf168806e174a96e46 libtasn1-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: ea2f32157521189a3e750d90f4671884a9309b8791f4f7cf168806e174a96e46 libtasn1-debugsource-4.20.0-5.el10_2.s390x.rpm SHA-256: c099c809bb43beec6ff5d3bcb20b7a29625cf6d80b20ea4c41c3d10406fcbace libtasn1-debugsource-4.20.0-5.el10_2.s390x.rpm SHA-256: c099c809bb43beec6ff5d3bcb20b7a29625cf6d80b20ea4c41c3d10406fcbace libtasn1-devel-4.20.0-5.el10_2.s390x.rpm SHA-256: c8fd3d6207fc5a507d9bff24f9649010f7e0fa40facc141f6873ab5c98eca15a libtasn1-tools-4.20.0-5.el10_2.s390x.rpm SHA-256: 3be7758e0440c5b12fcb163120ce746e4eb531afc7f1cf33260335305bccf86d libtasn1-tools-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: 3e0084892f5025422978531bc25043ffc4d892213fb9c541b39813d27edb165b libtasn1-tools-debuginfo-4.20.0-5.el10_2.s390x.rpm SHA-256: 3e0084892f5025422978531bc25043ffc4d892213fb9c541b39813d27edb165b Red Hat Enterprise Linux for Power, little endian 10 SRPM libtasn1-4.20.0-5.el10_2.src.rpm SHA-256: 4de84f4c996d68d0de6469024415e5236ed045a0305db1fc8255a1beec1914d0 ppc64le libtasn1-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 298611ad0f0a72fd8dfa72fbfbc6975a20cc2dee40ca5862860006e4ddba5938 libtasn1-debuginfo-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 506bccf6a11c03fd00c6f5f877eb802f898c8887a4c320b1f861d2cee9c0df1d libtasn1-debuginfo-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 506bccf6a11c03fd00c6f5f877eb802f898c8887a4c320b1f861d2cee9c0df1d libtasn1-debugsource-4.20.0-5.el10_2.ppc64le.rpm SHA-256: a02ecef16b9846bbd03bb724d3abc40b19208d5debb507f73f834f8030c4b947 libtasn1-debugsource-4.20.0-5.el10_2.ppc64le.rpm SHA-256: a02ecef16b9846bbd03bb724d3abc40b19208d5debb507f73f834f8030c4b947 libtasn1-devel-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 8639d4a58823c3d1e7cef3df9261c1019cb56b1ee9310d504716629661baa426 libtasn1-tools-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 0e4fcc549b2c79321dc20000354142383a75f3d00108f1f46650754279f81a91 libtasn1-tools-debuginfo-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 2f94f7c25fbf35c27cd99744648229b5cd1204fb1bf9d61db17d37ef80fafc40 libtasn1-tools-debuginfo-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 2f94f7c25fbf35c27cd99744648229b5cd1204fb1bf9d61db17d37ef80fafc40 Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM libtasn1-4.20.0-5.el10_2.src.rpm SHA-256: 4de84f4c996d68d0de6469024415e5236ed045a0305db1fc8255a1beec1914d0 ppc64le libtasn1-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 298611ad0f0a72fd8dfa72fbfbc6975a20cc2dee40ca5862860006e4ddba5938 libtasn1-debuginfo-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 506bccf6a11c03fd00c6f5f877eb802f898c8887a4c320b1f861d2cee9c0df1d libtasn1-debuginfo-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 506bccf6a11c03fd00c6f5f877eb802f898c8887a4c320b1f861d2cee9c0df1d libtasn1-debugsource-4.20.0-5.el10_2.ppc64le.rpm SHA-256: a02ecef16b9846bbd03bb724d3abc40b19208d5debb507f73f834f8030c4b947 libtasn1-debugsource-4.20.0-5.el10_2.ppc64le.rpm SHA-256: a02ecef16b9846bbd03bb724d3abc40b19208d5debb507f73f834f8030c4b947 libtasn1-devel-4.20.0-5.el10_2.ppc64le.rpm SHA-256: 8639d4a58