This Red Hat kernel update addresses two high-severity vulnerabilities: CVE-2026-46117 (CVSS 7.8), a user-triggerable WARN_ON() in the RDMA mana driver, and CVE-2026-53071 (CVSS 8.8), a missing lock in the Bluetooth L2CAP implementation. The NVD data indicates CVE-2026-46117 affects Linux kernel versions 6.8 through 6.12.90, 6.13 through 6.18.29, and 6.19 through 7.0.6, with fixes provided in kernel versions 6.12.91, 6.18.30, and 7.0.7. The advisory mandates a system reboot after applying the update.
Red Hat Product Errata RHSA-2026:42552 - Security Advisory Issued: 2026-07-21 Updated: 2026-07-21 RHSA-2026:42552 - Security Advisory Overview Updated Packages Synopsis Important: kernel security, bug fix, and enhancement 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 8. 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: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117) kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp (CVE-2026-53071) Bug Fix(es) and Enhancement(s): [rhel-8] WARNING: HARDIRQ-safe -> HARDIRQ-unsafe lock order detected - at: vmd_pci_write+0x85/0xe0 - deadlock (JIRA:RHEL-174916) 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 for x86_64 8 x86_64 Red Hat Enterprise Linux for IBM z Systems 8 s390x Red Hat Enterprise Linux for Power, little endian 8 ppc64le Red Hat Enterprise Linux for ARM 64 8 aarch64 Red Hat CodeReady Linux Builder for x86_64 8 x86_64 Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le Red Hat CodeReady Linux Builder for ARM 64 8 aarch64 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10 s390x Fixes BZ - 2482576 - CVE-2026-46117 kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() BZ - 2492458 - CVE-2026-53071 kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp CVEs CVE-2026-46117 CVE-2026-53071 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. 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