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Medium RLSA-2025:18318 6 CVEs

Moderate: kernel security update

Published Oct 26, 2025 · Updated Oct 26, 2025

Ecosystem: Rocky Linux

Summary

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

Security Fix(es):

* kernel: KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush (CVE-2025-38351)

* kernel: sunrpc: fix client side handling of tls alerts (CVE-2025-38571)

* kernel: eventpoll: Fix semi-unbounded recursion (CVE-2025-38614)

* kernel: ipv6: reject malicious packets in ipv6_gso_segment() (CVE-2025-38572)

* kernel: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare (CVE-2025-39817)

* kernel: scsi: lpfc: Fix buffer free/clear order in deferred receive path (CVE-2025-39841)

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 0:6.12.0-55.40.1.el10_0

Vulnerabilities 6

  • Critical 9.8
    CVE-2025-39841

    scsi: lpfc: Fix buffer free/clear order in deferred receive path

    In the Linux kernel, the following vulnerability has been resolved: scsi: lpfc: Fix buffer free/clear order in deferred receive path Fix a use-after-free window by correcting the buffer release sequence in the deferred receive path. The code freed the RQ buff…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.2
    CVE-2025-38571

    sunrpc: fix client side handling of tls alerts

    In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix client side handling of tls alerts A security exploit was discovered in NFS over TLS in tls_alert_recv due to its assumption that there is valid data in the msghdr's iterator's kv…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-38572

    ipv6: reject malicious packets in ipv6_gso_segment()

    In the Linux kernel, the following vulnerability has been resolved: ipv6: reject malicious packets in ipv6_gso_segment() syzbot was able to craft a packet with very long IPv6 extension headers leading to an overflow of skb->transport_header. This 16bit field …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-38614

    eventpoll: Fix semi-unbounded recursion

    In the Linux kernel, the following vulnerability has been resolved: eventpoll: Fix semi-unbounded recursion Ensure that epoll instances can never form a graph deeper than EP_MAX_NESTS+1 links. Currently, ep_loop_check_proc() ensures that the graph is loop-fre…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.1
    CVE-2025-39817

    efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare

    In the Linux kernel, the following vulnerability has been resolved: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare Observed on kernel 6.6 (present on master as well): BUG: KASAN: slab-out-of-bounds in memcmp+0x98/0xd0 Call trace: kasan_check_range+0xe…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2025-38351

    KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush

    In the Linux kernel, the following vulnerability has been resolved: KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush In KVM guests with Hyper-V hypercalls enabled, the hypercalls HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST and HVCALL_FLUSH_VIRTUAL_ADD…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2382059
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2389480
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2389491
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2389517
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2395805
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2396944