Red Hat Security Advisory: kernel security update

Fixed packages 160

Vulnerabilities 7

• Critical 9.8
  CVE-2025-38724

  nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm()

  In the Linux kernel, the following vulnerability has been resolved: nfsd: handle get_client_locked() failure in nfsd4_setclientid_confirm() Lei Lu recently reported that nfsd4_setclientid_confirm() did not check the return value from get_client_locked(). a SE…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 4, 2025
• High 8.8
  CVE-2025-39864

  wifi: cfg80211: fix use-after-free in cmp_bss()

  In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: fix use-after-free in cmp_bss() Following bss_free() quirk introduced in commit 776b3580178f ("cfg80211: track hidden SSID networks properly"), adjust cfg80211_update_known_bs…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 19, 2025
• High 8.8
  CVE-2025-39918

  wifi: mt76: fix linked list corruption

  In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: fix linked list corruption Never leave scheduled wcid entries on the temporary on-stack list

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Oct 1, 2025
• High 8.1
  CVE-2025-40186

  tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().

  In the Linux kernel, the following vulnerability has been resolved: tcp: Don't call reqsk_fastopen_remove() in tcp_conn_request(). syzbot reported the splat below in tcp_conn_request(). [0] If a listener is close()d while a TFO socket is being processed in tc…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Nov 12, 2025
• High 7.8
  CVE-2025-39881

  kernfs: Fix UAF in polling when open file is released

  In the Linux kernel, the following vulnerability has been resolved: kernfs: Fix UAF in polling when open file is released A use-after-free (UAF) vulnerability was identified in the PSI (Pressure Stall Information) monitoring mechanism: BUG: KASAN: slab-use-af…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 23, 2025
• Unscored —
  CVE-2025-39883

  mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory

  In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory When I did memory failure tests, below panic occurs: page dumped because: VM_BUG_ON_PAGE(PagePoisoned(page)) ker…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Sep 23, 2025
• Unscored —
  CVE-2025-39955

  tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect().

  In the Linux kernel, the following vulnerability has been resolved: tcp: Clear tcp_sk(sk)->fastopen_rsk in tcp_disconnect(). syzbot reported the splat below where a socket had tcp_sk(sk)->fastopen_rsk in the TCP_ESTABLISHED state. [0] syzbot reused the server…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Oct 9, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2393172
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2396934
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2397553
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2397558
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2400628
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2402699
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2414724
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_22392.json
• report
  https://access.redhat.com/security/cve/CVE-2025-38724
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38724
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38724
• article
  https://lore.kernel.org/linux-cve-announce/2025090401-CVE-2025-38724-5309@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39864
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39864
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39864
• article
  https://lore.kernel.org/linux-cve-announce/2025091906-CVE-2025-39864-a3a2@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39881
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39881
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39881
• article
  https://lore.kernel.org/linux-cve-announce/2025092301-CVE-2025-39881-a4e1@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39883
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39883
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39883
• article
  https://lore.kernel.org/linux-cve-announce/2025092302-CVE-2025-39883-6015@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39918
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39918
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39918
• article
  https://lore.kernel.org/linux-cve-announce/2025100119-CVE-2025-39918-7902@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-39955
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-39955
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-39955
• article
  https://lore.kernel.org/linux-cve-announce/2025100942-CVE-2025-39955-f36b@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-40186
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-40186
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-40186
• article
  https://lore.kernel.org/linux-cve-announce/2025111244-CVE-2025-40186-b204@gregkh/T