Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 124

Vulnerabilities 3

• Critical 9.1
  CVE-2025-10263 Public exploit

  Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X…

  Arm Neoverse V3 Cortex-X4 Neoverse V3AE Debian Ubuntu Alpine
  Jun 9, 2026
• High 7.8
  CVE-2026-64531 Public exploit

  net: openvswitch: reject oversized nested action attrs

  In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16. Commit a1e64addf3ff ("net: openvswitch: remove misbeh…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 27, 2026
• High 7.1
  CVE-2026-46054

  selinux: fix overlayfs mmap() and mprotect() access checks

  In the Linux kernel, the following vulnerability has been resolved: selinux: fix overlayfs mmap() and mprotect() access checks The existing SELinux security model for overlayfs is to allow access if the current task is able to access the top level file (the "…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 27, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2482025
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2486958
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507402
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_51746.json
• report
  https://access.redhat.com/security/cve/CVE-2025-10263
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-10263
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-10263
• article
  https://developer.arm.com/documentation/112137
• report
  https://access.redhat.com/security/cve/CVE-2026-46054
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46054
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46054
• article
  https://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46054-b185@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-64531
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64531
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-64531
• article
  https://lore.kernel.org/linux-cve-announce/2026072732-CVE-2026-64531-e4ce@gregkh/T