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Medium ALSA-2025:21398 1 CVE

Moderate: kernel security update

Published Nov 17, 2025 · Updated Oct 29, 2026

Summary

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

Security Fix(es):

* kernel: vsock/virtio: Validate length in packet header before skb_put() (CVE-2025-39718)

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 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-abi-stablelists 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-core 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-cross-headers 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-debug 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-debug-core 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-debug-devel 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-debug-modules 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-debug-modules-extra 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-devel 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-doc 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-headers 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-modules 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-modules-extra 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-tools 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-tools-libs 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-tools-libs-devel 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-zfcpdump 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-core 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-devel 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-modules 4.18.0-553.84.1.el8_10
AlmaLinux · 8 kernel-zfcpdump-modules-extra 4.18.0-553.84.1.el8_10
AlmaLinux · 8 perf 4.18.0-553.84.1.el8_10
AlmaLinux · 8 python3-perf 4.18.0-553.84.1.el8_10

Vulnerabilities 1

  • High 8.4

    vsock/virtio: Validate length in packet header before skb_put()

    In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: Validate length in packet header before skb_put() When receiving a vsock packet in the guest, only the virtqueue buffer size is validated prior to virtio_vsock_skb_rx_put(). Unf…

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-39718
  • report
    https://bugzilla.redhat.com/2393507
  • advisory
    https://errata.almalinux.org/8/ALSA-2025-21398.html