Red Hat Security Advisory: kernel security update

Fixed packages 91

Vulnerabilities 3

• High 7.8
  CVE-2025-38499

  clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns

  In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 11, 2025
• High 7.8
  CVE-2025-39966

  iommufd: Fix race during abort for file descriptors

  In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix race during abort for file descriptors fput() doesn't actually call file_operations release() synchronously, it puts the file on a work queue and it will be released eventually. …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Oct 15, 2025
• Unscored —
  CVE-2025-39984

  net: tun: Update napi->skb after XDP process

  In the Linux kernel, the following vulnerability has been resolved: net: tun: Update napi->skb after XDP process The syzbot report a UAF issue: BUG: KASAN: slab-use-after-free in skb_reset_mac_header include/linux/skbuff.h:3150 [inline] BUG: KASAN: slab-use-a…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Oct 15, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2387670
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2404107
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2404111
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_23250.json
• report
  https://access.redhat.com/security/cve/CVE-2025-38499
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38499
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38499
• article
  https://lore.kernel.org/linux-cve-announce/2025081112-CVE-2025-38499-4572@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39966
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39966
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39966
• article
  https://lore.kernel.org/linux-cve-announce/2025101553-CVE-2025-39966-736b@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39984
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39984
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39984
• article
  https://lore.kernel.org/linux-cve-announce/2025101500-CVE-2025-39984-2d3f@gregkh/T