Red Hat Security Advisory: kernel security update

Fixed packages 49

Vulnerabilities 3

• High 8.8
  CVE-2022-49111

  Bluetooth: Fix use after free in hci_send_acl

  In the Linux kernel, the following vulnerability has been resolved: Bluetooth: Fix use after free in hci_send_acl This fixes the following trace caused by receiving HCI_EV_DISCONN_PHY_LINK_COMPLETE which does call hci_conn_del without first checking if conn->…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Feb 26, 2025
• High 7.8
  CVE-2025-21764

  ndisc: use RCU protection in ndisc_alloc_skb()

  In the Linux kernel, the following vulnerability has been resolved: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Feb 27, 2025
• High 7.1
  CVE-2022-49395

  um: Fix out-of-bounds read in LDT setup

  In the Linux kernel, the following vulnerability has been resolved: um: Fix out-of-bounds read in LDT setup syscall_stub_data() expects the data_count parameter to be the number of longs, not bytes. ============================================================…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Feb 26, 2025

References

• article
  https://access.redhat.com/security/updates/classification/#moderate
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2347899
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2347952
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2348575
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_10211.json
• report
  https://access.redhat.com/security/cve/CVE-2022-49111
• advisory
  https://www.cve.org/CVERecord?id=CVE-2022-49111
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2022-49111
• article
  https://lore.kernel.org/linux-cve-announce/2025022602-CVE-2022-49111-8795@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2022-49395
• advisory
  https://www.cve.org/CVERecord?id=CVE-2022-49395
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2022-49395
• article
  https://lore.kernel.org/linux-cve-announce/2025022650-CVE-2022-49395-7419@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2025-21764
• advisory
  https://www.cve.org/CVERecord?id=CVE-2025-21764
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2025-21764
• article
  https://lore.kernel.org/linux-cve-announce/2025022605-CVE-2025-21764-1061@gregkh/T