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High RLSA-2025:23279 2 CVEs

Important: kernel security update

Published Dec 24, 2025 · Updated Dec 24, 2025

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns (CVE-2025-38499)

* kernel: net: tun: Update napi->skb after XDP process (CVE-2025-39984)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 10 kernel 0:6.12.0-124.21.1.el10_1

Vulnerabilities 2

  • High 7.8

    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 …

  • Unscored —

    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…

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2387670
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2404111