ESB-2026.7584

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.7584 kernel security, bug fix, and enhancement update 9 July 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-43341 CVE-2026-46259 CVE-2026-43276 CVE-2026-46242 CVE-2026-46155 CVE-2026-43074 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:36541 Comment: CVSS (Max): 7.3 CVE-2026-43074 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H EPSS (Max): 0.5% (37th) CVE-2026-46155 2026-07-07 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:36541 - Security Advisory Issued: 2026-07-08 Updated: 2026-07-08 Synopsis Kernel security, bug fix, and enhancement update Type/Severity Security Advisory: Important Topic An update for kernel is now available for Red Hat Enterprise Linux 10. 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): o kernel: eventpoll: defer struct eventpoll free to RCU grace period (CVE-2026-43074) o kernel: net: mana: Fix double destroy_workqueue on service rescan PCI path (CVE-2026-43276) o kernel: net/ipv6: ioam6: prevent schema length wraparound in trace fill (CVE-2026-43341) o kernel: smb/client: fix out-of-bounds read in smb2_compound_op() (CVE-2026-46155) o kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242) o kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CVE-2026-46259) Bug Fix(es) and Enhancement(s): o CNB103: net: page_pool: avoid false positive warning if NAPI was never added [rhel-10.2.z] (JIRA:RHEL-162140) o [RHEL 10] Bonding reports unknown speed/duplex for tg3 interface [rhel-10.2.z] (JIRA:RHEL-182770) 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 o Red Hat Enterprise Linux for x86_64 10 x86_64 o Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64 o Red Hat Enterprise Linux for IBM z Systems 10 s390x o Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x o Red Hat Enterprise Linux for Power, little endian 10 ppc64le o Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le o Red Hat Enterprise Linux for ARM 64 10 aarch64 o Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64 o Red Hat CodeReady Linux Builder for x86_64 10 x86_64 o Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le o Red Hat CodeReady Linux Builder for ARM 64 10 aarch64 o Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x o Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.2 x86_64 o Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.2 ppc64le o Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.2 s390x o Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.2 aarch64 o Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64 o Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x o Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le o Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64 o Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64 o Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64 o Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le o Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x Fixes o BZ - 2467019 - CVE-2026-43074 kernel: eventpoll: defer struct eventpoll free to RCU grace period o BZ - 2467113 - CVE-2026-43276 kernel: net: mana: Fix double destroy_workqueue on service rescan PCI path o BZ - 2468097 - CVE-2026-43341 kernel: net/ipv6: ioam6: prevent schema length wraparound in trace fill o BZ - 2482660 - CVE-2026-46155 kernel: smb/client: fix out-of-bounds read in smb2_compound_op() o BZ - 2483519 - CVE-2026-46242 kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF o BZ - 2484477 - CVE-2026-46259 kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat() CVEs o CVE-2026-43074 o CVE-2026-43276 o CVE-2026-43341 o CVE-2026-46155 o CVE-2026-46242 o CVE-2026-46259 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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