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High RLSA-2026:39180 2 CVEs

Important: kernel-rt security update

Published Jul 15, 2026 · Updated Jul 15, 2026

Summary

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: net: bridge: use a stable FDB dst snapshot in RCU readers (CVE-2026-46086)

* kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete (CVE-2026-46116)

* kernel: XFS data corruption using reflink ()

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 · 8 kernel-rt 0:4.18.0-553.144.1.rt7.485.el8_10

Vulnerabilities 2

  • High 7.8

    xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete

    In the Linux kernel, the following vulnerability has been resolved: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete KASAN reproduces a slab-use-after-free in __xfrm_state_delete()'s hlist_del_rcu calls under syzkaller load on linux-6.12.y sta…

  • Unscored —

    net: bridge: use a stable FDB dst snapshot in RCU readers

    In the Linux kernel, the following vulnerability has been resolved: net: bridge: use a stable FDB dst snapshot in RCU readers Local FDB entries can be rewritten in place by `fdb_delete_local()`, which updates `f->dst` to another port or to `NULL` while keepin…

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2481989
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482523