This advisory addresses two vulnerabilities in the Linux kernel: CVE-2026-43198, a critical race condition in TCP IPv6 connection handling (CVSS 9.8), and CVE-2026-46181, a high-severity RCU misuse in the RDMA driver (CVSS 7.8). The NVD data indicates affected kernel versions are up to 6.18.16 and 6.19.6 for CVE-2026-43198, and up to 6.18.30 and 7.0.7 for CVE-2026-46181, with fixes available in those respective versions. For Red Hat Enterprise Linux 7 ELS, the specific remediation is to apply the provided kernel update and reboot the system.
Red Hat Product Errata RHSA-2026:36216 - Security Advisory Issued: 2026-07-07 Updated: 2026-07-07 RHSA-2026:36216 - Security Advisory Overview Updated Packages Synopsis Important: kernel security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for kernel 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 Important. 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 kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198) kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181) 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 The system must be rebooted for this update to take effect. 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 - 2467228 - CVE-2026-43198 kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() BZ - 2482532 - CVE-2026-46181 kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() CVEs CVE-2026-43198 CVE-2026-46181 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. 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