Red Hat Security Advisory: kernel security update

Fixed packages 158

Vulnerabilities 4

• High 8.8
  CVE-2025-39806

  HID: multitouch: fix slab out-of-bounds access in mt_report_fixup()

  In the Linux kernel, the following vulnerability has been resolved: HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() A malicious HID device can trigger a slab out-of-bounds during mt_report_fixup() by passing in report descriptor smaller th…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 16, 2025
• High 7.5
  CVE-2025-40240

  sctp: avoid NULL dereference when chunk data buffer is missing

  In the Linux kernel, the following vulnerability has been resolved: sctp: avoid NULL dereference when chunk data buffer is missing chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only. chunk->skb can only be NULL if chunk->he…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Dec 4, 2025
• High 7.1
  CVE-2025-39840

  audit: fix out-of-bounds read in audit_compare_dname_path()

  In the Linux kernel, the following vulnerability has been resolved: audit: fix out-of-bounds read in audit_compare_dname_path() When a watch on dir=/ is combined with an fsnotify event for a single-character name directly under / (e.g., creating /a), an out-o…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Sep 19, 2025
• Unscored —
  CVE-2025-39883

  mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory

  In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory When I did memory failure tests, below panic occurs: page dumped because: VM_BUG_ON_PAGE(PagePoisoned(page)) ker…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 23, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2395807
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2396936
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2397553
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2418832
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_0445.json
• report
  https://access.redhat.com/security/cve/CVE-2025-39806
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39806
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39806
• article
  https://lore.kernel.org/linux-cve-announce/2025091613-CVE-2025-39806-f74d@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39840
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39840
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39840
• article
  https://lore.kernel.org/linux-cve-announce/2025091902-CVE-2025-39840-bad6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39883
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39883
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39883
• article
  https://lore.kernel.org/linux-cve-announce/2025092302-CVE-2025-39883-6015@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40240
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40240
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40240
• article
  https://kernelcve.org/list/?q=CVE-2025-40240
• article
  https://lore.kernel.org/linux-cve-announce/2025120403-CVE-2025-40240-745a@gregkh/T