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OpenAdvisories
Critical RHSA-2026:45115 4 CVEs

Red Hat Security Advisory: kernel security update

Published Jul 28, 2026 · Updated Oct 17, 2026

Ecosystem: Red Hat

Fixed packages 43

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::baseos bpftool 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos bpftool-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-abi-stablelists 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-core 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debug 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debug-core 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debug-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debug-devel 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debug-modules 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debug-modules-extra 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debuginfo-common-aarch64 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debuginfo-common-ppc64le 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debuginfo-common-s390x 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-debuginfo-common-x86_64 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-devel 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-doc 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-modules 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-modules-extra 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-tools 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-tools-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-tools-libs 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-zfcpdump 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-zfcpdump-core 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-zfcpdump-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-zfcpdump-devel 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-zfcpdump-modules 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos kernel-zfcpdump-modules-extra 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos perf 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos perf-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos python3-perf 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::baseos python3-perf-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb bpftool-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-debug-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-debuginfo-common-aarch64 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-debuginfo-common-ppc64le 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-debuginfo-common-x86_64 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-tools-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb kernel-tools-libs-devel 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb perf-debuginfo 0:4.18.0-553.147.1.el8_10
Red Hat · RHEL 8 enterprise_linux:8::crb python3-perf-debuginfo 0:4.18.0-553.147.1.el8_10

Vulnerabilities 4

  • Critical 9.8
    CVE-2026-52993 Public exploit

    tipc: fix double-free in tipc_buf_append()

    In the Linux kernel, the following vulnerability has been resolved: tipc: fix double-free in tipc_buf_append() tipc_msg_validate() can potentially reallocate the skb it is validating, freeing the old one. In tipc_buf_append(), it was being called with a point…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-64561 Public exploit

    KVM: x86: Check for invalid/obsolete root *after* making MMU pages available

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Check for invalid/obsolete root *after* making MMU pages available Check for a "stale" page fault, i.e. for an invalid and/or obsolete root, after making MMU pages available for the…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.9
    CVE-2025-40026

    KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O When completing emulation of instruction that generated a userspace exit for I/O, don't recheck L1 intercepts as KVM has …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Medium 6.3
    CVE-2026-53059

    dm log: fix out-of-bounds write due to region_count overflow

    In the Linux kernel, the following vulnerability has been resolved: dm log: fix out-of-bounds write due to region_count overflow The local variable region_count in create_log_context() is declared as unsigned int (32-bit), but dm_sector_div_up() returns secto…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2406712
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2492277
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2492437
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_45115.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-40026
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-40026
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-40026
  • article
    https://lore.kernel.org/linux-cve-announce/2025102841-CVE-2025-40026-760b@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-52993
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-52993
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-52993
  • article
    https://lore.kernel.org/linux-cve-announce/2026062445-CVE-2026-52993-34a2@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-53059
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-53059
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-53059
  • article
    https://lore.kernel.org/linux-cve-announce/2026062401-CVE-2026-53059-f32e@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-64561
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2510891
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-64561
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-64561
  • article
    https://lore.kernel.org/linux-cve-announce/2026080401-CVE-2026-64561-d0d4@gregkh/T