Red Hat Security Advisory: kernel security update

Fixed packages 46

Vulnerabilities 7

• High 7.8
  CVE-2025-38352 Exploited Public exploit

  posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()

  In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del() If an exiting non-autoreaping task has already passed exit_notify() and calls handle_posix_cpu_timers() …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 22, 2025

  KEV Sep 4, 2025
• High 7.8
  CVE-2022-50000

  netfilter: flowtable: fix stuck flows on cleanup due to pending work

  In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: fix stuck flows on cleanup due to pending work To clear the flow table on flow table free, the following sequence normally happens in order: 1) gc_step work is stopped t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 18, 2025
• High 7.8
  CVE-2025-21759

  ipv6: mcast: extend RCU protection in igmp6_send()

  In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: extend RCU protection in igmp6_send() igmp6_send() can be called without RTNL or RCU being held. Extend RCU protection so that we can safely fetch the net pointer and avoid a pot…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 27, 2025
• High 7.8
  CVE-2025-38085

  mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race

  In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race huge_pmd_unshare() drops a reference on a page table that may have previously been shared across processes, potentially turning it into a n…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 28, 2025
• High 7.8
  CVE-2025-38464

  tipc: Fix use-after-free in tipc_conn_close().

  In the Linux kernel, the following vulnerability has been resolved: tipc: Fix use-after-free in tipc_conn_close(). syzbot reported a null-ptr-deref in tipc_conn_close() during netns dismantle. [0] tipc_topsrv_stop() iterates tipc_net(net)->topsrv->conn_idr an…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2025
• Medium 6.7
  CVE-2023-2513

  A use-after-free vulnerability was found in the Linux kernel's ext4 filesystem in the way it handled the extra inode si…

  linux-raspi2 linux-hwe linux-azure linux-riscv Linux Debian Ubuntu Azure Linux
  May 8, 2023
• Unscored —
  CVE-2025-38159

  wifi: rtw88: fix the 'para' buffer size to avoid reading out of bounds

  In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: fix the 'para' buffer size to avoid reading out of bounds Set the size to 6 instead of 2, since 'para' array is passed to 'rtw_fw_bt_wifi_control(rtwdev, para[0], &para[1])', whi…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 3, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2193097
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2348596
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2373543
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2375304
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2376064
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2382581
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2383509
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_15660.json
• report
  https://access.redhat.com/security/cve/CVE-2022-50000
• advisory
  https://www.cve.org/CVERecord?id=CVE-2022-50000
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2022-50000
• article
  https://lore.kernel.org/linux-cve-announce/2025061828-CVE-2022-50000-5753@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2023-2513
• advisory
  https://www.cve.org/CVERecord?id=CVE-2023-2513
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2023-2513
• report
  https://access.redhat.com/security/cve/CVE-2025-21759
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-21759
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-21759
• article
  https://kernelcve.org/list/?q=CVE-2025-21759
• article
  https://lore.kernel.org/linux-cve-announce/2025022604-CVE-2025-21759-ad7c@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-38085
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38085
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38085
• article
  https://lore.kernel.org/linux-cve-announce/2025062836-CVE-2025-38085-8075@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-38159
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38159
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38159
• article
  https://lore.kernel.org/linux-cve-announce/2025070339-CVE-2025-38159-0c95@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-38352
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38352
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38352
• article
  https://kernelcve.org/list/?q=CVE-2025-38352
• article
  https://lore.kernel.org/linux-cve-announce/2025072229-CVE-2025-38352-f1de@gregkh/T
• article
  https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• report
  https://access.redhat.com/security/cve/CVE-2025-38464
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-38464
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-38464
• article
  https://lore.kernel.org/linux-cve-announce/2025072508-CVE-2025-38464-44a1@gregkh/T