Red Hat Security Advisory: kernel security update

Fixed packages 48

Vulnerabilities 4

• High 8.8
  CVE-2026-43112

  fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath

  In the Linux kernel, the following vulnerability has been resolved: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath When cifs_sanitize_prepath is called with an empty string or a string containing only delimiters (e.g., "/"), the current logic …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 6, 2026
• 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
  Jun 24, 2026
• Unscored —
  CVE-2026-31787 Public exploit

  xen/privcmd: fix double free via VMA splitting

  In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: fix double free via VMA splitting privcmd_vm_ops defines .close (privcmd_close), but neither .may_split nor .open. When userspace does a partial munmap() on a privcmd mapping, th…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Apr 30, 2026
• Unscored —
  CVE-2026-43163

  md/bitmap: fix GPF in write_page caused by resize race

  In the Linux kernel, the following vulnerability has been resolved: md/bitmap: fix GPF in write_page caused by resize race A General Protection Fault occurs in write_page() during array resize: RIP: 0010:write_page+0x22b/0x3c0 [md_mod] This is a use-after-fre…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 6, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2464092
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2467015
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2467059
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2477784
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492277
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_53989.json
• report
  https://access.redhat.com/security/cve/CVE-2026-31787
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-31787
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-31787
• article
  https://lore.kernel.org/linux-cve-announce/2026043034-CVE-2026-31787-f6cc@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-43112
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-43112
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-43112
• article
  https://lore.kernel.org/linux-cve-announce/2026050625-CVE-2026-43112-f37f@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-43163
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-43163
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-43163
• article
  https://lore.kernel.org/linux-cve-announce/2026050632-CVE-2026-43163-86e1@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