Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Fixed packages 160

Vulnerabilities 11

• Critical 9.8
  CVE-2026-63887

  scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf

  In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Bound iscsi_encode_text_output() appends to rsp_buf iscsi_encode_text_output() concatenates "key=value\0" records into login->rsp_buf, an 8192-byte kzalloc(MAX_KEY_VALUE_…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• Critical 9.8
  CVE-2026-63888

  scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd()

  In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() Two latent bugs in the Text-phase handler, both present since the original LIO integration in commit e48354ce…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• Critical 9.8
  CVE-2026-64268

  RDMA/siw: bound Read Response placement to the RREAD length

  In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Response placement to the RREAD length In drivers/infiniband/sw/siw/siw_qp_rx.c, siw_proc_rresp() places each inbound Read Response DDP segment at sge->laddr + wqe->proce…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2026
• Critical 9.8
  CVE-2026-64387

  smb: client: fix query directory replay double-free

  In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_init() fails before the next…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2026
• High 8.8
  CVE-2026-64382

  smb: client: fix double-free in SMB2_open() replay

  In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_open() replay A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_open_init() fails before the next send, clean…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2026
• High 8.8
  CVE-2026-64438

  crypto: qat - fix VF2PF work teardown race in adf_disable_sriov()

  In the Linux kernel, the following vulnerability has been resolved: crypto: qat - fix VF2PF work teardown race in adf_disable_sriov() The VF2PF interrupt handler queues PF-side response work that stores a raw pointer to per-VF state (struct adf_accel_vf_info)…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 25, 2026
• High 8.4
  CVE-2026-63952

  memfd: deny writeable mappings when implying SEAL_WRITE

  In the Linux kernel, the following vulnerability has been resolved: memfd: deny writeable mappings when implying SEAL_WRITE When SEAL_EXEC is added, SEAL_WRITE is implied to make W^X. But the implied seal is set after the check that makes sure the memfd can n…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.8
  CVE-2026-46117

  RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss()

  In the Linux kernel, the following vulnerability has been resolved: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() Sashiko points out that the user can specify WQs sharing the same CQ as a part of the uAPI and this will trigger the WA…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 28, 2026
• High 7.8
  CVE-2026-53000

  netfilter: nat: use kfree_rcu to release ops

  In the Linux kernel, the following vulnerability has been resolved: netfilter: nat: use kfree_rcu to release ops Florian Westphal says: "Historically this is not an issue, even for normal base hooks: the data path doesn't use the original nf_hook_ops that are…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jun 24, 2026
• High 7.1
  CVE-2026-46150

  fanotify: fix false positive on permission events

  In the Linux kernel, the following vulnerability has been resolved: fanotify: fix false positive on permission events fsnotify_get_mark_safe() may return false for a mark on an unrelated group, which results in bypassing the permission check. Fix by skipping …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 28, 2026
• Unscored —
  CVE-2026-68166

  userfaultfd: prevent registration of special VMAs

  In the Linux kernel, the following vulnerability has been resolved: userfaultfd: prevent registration of special VMAs Vova Tokarev says: userfaultfd allows registration on shadow stack VMAs. With userfaultfd access, you can register on the shadow stack, disca…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 10, 2026

References

• article
  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2482576
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2482612
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2492273
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502422
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502443
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2502447
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507042
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507046
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507089
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2507118
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2513167
• advisory
  https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_67720.json
• report
  https://access.redhat.com/security/cve/CVE-2026-46117
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46117
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46117
• article
  https://lore.kernel.org/linux-cve-announce/2026052814-CVE-2026-46117-a93b@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-46150
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-46150
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-46150
• article
  https://lore.kernel.org/linux-cve-announce/2026052822-CVE-2026-46150-c96d@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-53000
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-53000
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-53000
• article
  https://lore.kernel.org/linux-cve-announce/2026062447-CVE-2026-53000-2568@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-63887
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-63887
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-63887
• article
  https://lore.kernel.org/linux-cve-announce/2026071940-CVE-2026-63887-cf4b@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-63888
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-63888
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-63888
• article
  https://lore.kernel.org/linux-cve-announce/2026071940-CVE-2026-63888-a5d6@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-63952
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-63952
• advisory
  https://nvd.nist.gov/vuln/detail/CVE-2026-63952
• article
  https://lore.kernel.org/linux-cve-announce/2026071955-CVE-2026-63952-0c7b@gregkh/T
• report
  https://access.redhat.com/security/cve/CVE-2026-64268
• advisory
  https://www.cve.org/CVERecord?id=CVE-2026-64268