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Medium ALSA-2025:17397 2 CVEs

Moderate: kernel security update

Published Oct 6, 2025 · Updated Oct 29, 2026

Summary

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

Security Fix(es):

* kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527)
* kernel: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() (CVE-2025-39730)

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 25

ReleasePackageFixed in
AlmaLinux · 8 bpftool 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-abi-stablelists 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-core 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-cross-headers 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-debug 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-debug-core 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-debug-devel 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-debug-modules 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-debug-modules-extra 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-devel 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-doc 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-headers 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-modules 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-modules-extra 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-tools 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-tools-libs 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-tools-libs-devel 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-zfcpdump 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-core 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-devel 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-modules 4.18.0-553.78.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-modules-extra 4.18.0-553.78.1.el8_10
AlmaLinux · 8 perf 4.18.0-553.78.1.el8_10
AlmaLinux · 8 python3-perf 4.18.0-553.78.1.el8_10

Vulnerabilities 2

  • Critical 9.8

    smb: client: fix use-after-free in cifs_oplock_break

    In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free in cifs_oplock_break A race condition can occur in cifs_oplock_break() leading to a use-after-free of the cinode structure when unmounting: cifs_oplock_break()…

  • Unscored —

    NFS: Fix filehandle bounds checking in nfs_fh_to_dentry()

    In the Linux kernel, the following vulnerability has been resolved: NFS: Fix filehandle bounds checking in nfs_fh_to_dentry() The function needs to check the minimal filehandle length before it can access the embedded filehandle.

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-38527
  • report
    https://access.redhat.com/security/cve/CVE-2025-39730
  • report
    https://bugzilla.redhat.com/2388928
  • report
    https://bugzilla.redhat.com/2393731
  • advisory
    https://errata.almalinux.org/8/ALSA-2025-17397.html