This Red Hat kpatch update addresses three high-severity Linux kernel vulnerabilities: a use-after-free in eventpoll (CVE-2026-46242, CVSS 7.8), an IPv6 fragment escape flaw (CVE-2026-53362, CVSS 7.8), and a use-after-free in KVM shadow paging (CVE-2026-53359, CVSS 8.8). The affected version ranges are extensive and vary per CVE, as detailed in the NVD data, impacting multiple major kernel series. The fix is delivered via the `kpatch-patch-6_12_0-211_16_1` live patch module for Red Hat Enterprise Linux 10.
Red Hat Product Errata RHSA-2026:43826 - Security Advisory Issued: 2026-07-22 Updated: 2026-07-22 RHSA-2026:43826 - Security Advisory Overview Updated Packages Synopsis Important: kpatch-patch-6_12_0-211_16_1 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 kpatch-patch-6_12_0-211_16_1 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 This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-6.12.0-211.16.1.el10_2. Security Fix(es): kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF (CVE-2026-46242) kernel: kernel: ipv6 frag escape (CVE-2026-53362) kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role (CVE-2026-53359) 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 Power, little endian 10 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le 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 Power, little endian - Extended Life Cycle 10.2 ppc64le Fixes BZ - 2483519 - CVE-2026-46242 kernel: eventpoll: fix ep_remove struct eventpoll / struct file UAF BZ - 2495904 - CVE-2026-53362 kernel: kernel: ipv6 frag escape BZ - 2497033 - CVE-2026-53359 kernel: KVM: x86: Fix shadow paging use-after-free due to unexpected role CVEs CVE-2026-46242 CVE-2026-53359 CVE-2026-53362 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. Red Hat Enterprise Linux for x86_64 10 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 x86_64 kpatch-patch-6_12_0-211_16_1-1-4.el10_2.x86_64.rpm SHA-256: 175b7b9819e52b02050d6bb37de61b67ce3686db5fe49e7d63d89f5adb0d1bf7 kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.x86_64.rpm SHA-256: 06b7db1637d2c98fca47752b731189d25b9891e77e7eefea1bcf4e94d4002351 Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 x86_64 kpatch-patch-6_12_0-211_16_1-1-4.el10_2.x86_64.rpm SHA-256: 175b7b9819e52b02050d6bb37de61b67ce3686db5fe49e7d63d89f5adb0d1bf7 kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.x86_64.rpm SHA-256: 06b7db1637d2c98fca47752b731189d25b9891e77e7eefea1bcf4e94d4002351 Red Hat Enterprise Linux for Power, little endian 10 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 ppc64le kpatch-patch-6_12_0-211_16_1-1-4.el10_2.ppc64le.rpm SHA-256: b6d1ffacf364bf203d30217707c9c679a5d0e51581633023fbf171374a5be09d kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.ppc64le.rpm SHA-256: d29e1e611766e0c83d4973630cab8ebe8741d4f11f39c05a866e7bd3a1456cd7 kpatch-patch-6_12_0-211_16_1-debugsource-1-4.el10_2.ppc64le.rpm SHA-256: f05bc275ac00cd6613c5a6aa91eb5e848ee4805fe254a7d68a1d529c19dcd5fe Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 ppc64le kpatch-patch-6_12_0-211_16_1-1-4.el10_2.ppc64le.rpm SHA-256: b6d1ffacf364bf203d30217707c9c679a5d0e51581633023fbf171374a5be09d kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.ppc64le.rpm SHA-256: d29e1e611766e0c83d4973630cab8ebe8741d4f11f39c05a866e7bd3a1456cd7 kpatch-patch-6_12_0-211_16_1-debugsource-1-4.el10_2.ppc64le.rpm SHA-256: f05bc275ac00cd6613c5a6aa91eb5e848ee4805fe254a7d68a1d529c19dcd5fe Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 ppc64le kpatch-patch-6_12_0-211_16_1-1-4.el10_2.ppc64le.rpm SHA-256: b6d1ffacf364bf203d30217707c9c679a5d0e51581633023fbf171374a5be09d kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.ppc64le.rpm SHA-256: d29e1e611766e0c83d4973630cab8ebe8741d4f11f39c05a866e7bd3a1456cd7 kpatch-patch-6_12_0-211_16_1-debugsource-1-4.el10_2.ppc64le.rpm SHA-256: f05bc275ac00cd6613c5a6aa91eb5e848ee4805fe254a7d68a1d529c19dcd5fe Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 x86_64 kpatch-patch-6_12_0-211_16_1-1-4.el10_2.x86_64.rpm SHA-256: 175b7b9819e52b02050d6bb37de61b67ce3686db5fe49e7d63d89f5adb0d1bf7 kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.x86_64.rpm SHA-256: 06b7db1637d2c98fca47752b731189d25b9891e77e7eefea1bcf4e94d4002351 Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 x86_64 kpatch-patch-6_12_0-211_16_1-1-4.el10_2.x86_64.rpm SHA-256: 175b7b9819e52b02050d6bb37de61b67ce3686db5fe49e7d63d89f5adb0d1bf7 kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.x86_64.rpm SHA-256: 06b7db1637d2c98fca47752b731189d25b9891e77e7eefea1bcf4e94d4002351 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 SRPM kpatch-patch-6_12_0-211_16_1-1-4.el10_2.src.rpm SHA-256: 352eb993f348ac2af788b0b8a261a5e6034037b69549353ed6db9febb8b39ff1 ppc64le kpatch-patch-6_12_0-211_16_1-1-4.el10_2.ppc64le.rpm SHA-256: b6d1ffacf364bf203d30217707c9c679a5d0e51581633023fbf171374a5be09d kpatch-patch-6_12_0-211_16_1-debuginfo-1-4.el10_2.ppc64le.rpm SHA-256: d29e1e611766e0c83d4973630cab8ebe8741d4f11f39c05a866e7bd3a1456cd7 kpatch-patch-6_12_0-211_16_1-debugsource-1-4.el10_2.ppc64le.rpm SHA-256: f05bc275ac00cd6613c5a6aa91eb5e848ee4805fe254a7d68a1d529c19dcd5fe The Red Hat security contact is secalert@redhat.com . 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