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

Fixed packages 158

Vulnerabilities 27

• Critical 9.8
  CVE-2026-53399

  nfsd: release layout stid on setlease failure

  In the Linux kernel, the following vulnerability has been resolved: nfsd: release layout stid on setlease failure nfs4_alloc_stid() publishes the new stid into cl->cl_stateids via idr_alloc_cyclic() under cl_lock before returning to nfsd4_alloc_layout_stateid…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 19, 2026
• Critical 9.8
  CVE-2026-63800

  pNFS: Fix use-after-free in pnfs_update_layout()

  In the Linux kernel, the following vulnerability has been resolved: pNFS: Fix use-after-free in pnfs_update_layout() When hitting the NFS_LAYOUT_RETURN branch in pnfs_update_layout(), the code calls pnfs_prepare_to_retry_layoutget(lo). If it succeeds, pnfs_pu…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• Critical 9.8
  CVE-2026-63808

  exfat: fix potential use-after-free in exfat_find_dir_entry()

  In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfat_find_dir_entry() In exfat_find_dir_entry(), the buffer_head obtained from exfat_get_dentry() is released with brelse(bh) before the fall-through T…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• Critical 9.8
  CVE-2026-63886

  scsi: target: iscsi: Validate CHAP_R length before base64 decode

  In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Validate CHAP_R length before base64 decode chap_server_compute_hash() allocates client_digest as kzalloc(chap->digest_size) and then, for BASE64-encoded responses, passe…

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

  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
• Critical 9.8
  CVE-2026-72069

  locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()

  In the Linux kernel, the following vulnerability has been resolved: locking/rt: Fix the incorrect RCU protection in rt_spin_unlock() rt_spin_unlock() releases the RCU protection before unlocking the lock. That opens the door for the following UAF scenario: T1…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• Critical 9.8
  CVE-2026-72130

  nvmet-auth: reject short AUTH_RECEIVE buffers

  In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: reject short AUTH_RECEIVE buffers nvmet_execute_auth_receive() trusts the AUTH_RECEIVE allocation length after checking only that it is nonzero and matches the transfer length. In…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 15, 2026
• Critical 9.3
  CVE-2026-64018

  net: mana: validate rx_req_idx to prevent out-of-bounds array access

  In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-S…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• Critical 9.1
  CVE-2026-46185

  smb/client: fix out-of-bounds read in symlink_data()

  In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response, in symlink_data() it is possible for …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  May 28, 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-2026-64490

  ALSA: virtio: Validate control metadata from the device

  In the Linux kernel, the following vulnerability has been resolved: ALSA: virtio: Validate control metadata from the device virtio-snd control handling trusts the device-provided control type and value count returned by the device. That metadata is then used …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 25, 2026
• High 7.8
  CVE-2025-40064

  smc: Fix use-after-free in __pnet_find_base_ndev().

  In the Linux kernel, the following vulnerability has been resolved: smc: Fix use-after-free in __pnet_find_base_ndev(). syzbot reported use-after-free of net_device in __pnet_find_base_ndev(), which was called during connect(). [0] smc_pnet_find_ism_resource(…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Oct 28, 2025
• High 7.8
  CVE-2026-45970

  bonding: alb: fix UAF in rlb_arp_recv during bond up/down

  In the Linux kernel, the following vulnerability has been resolved: bonding: alb: fix UAF in rlb_arp_recv during bond up/down The ALB RX path may access rx_hashtbl concurrently with bond teardown. During rapid bond up/down cycles, rlb_deinitialize() frees rx_…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  May 27, 2026
• High 7.8
  CVE-2026-63824

  KEYS: fix overflow in keyctl_pkey_params_get_2()

  In the Linux kernel, the following vulnerability has been resolved: KEYS: fix overflow in keyctl_pkey_params_get_2() The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided. Fix the bu…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.8
  CVE-2026-64002

  ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()

  In the Linux kernel, the following vulnerability has been resolved: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports too soon. Only after unr…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.8
  CVE-2026-64304

  crypto: qat - validate RSA CRT component lengths

  In the Linux kernel, the following vulnerability has been resolved: crypto: qat - validate RSA CRT component lengths The generic RSA key parser (rsa_helper.c) bounds each CRT component (p, q, dp, dq, qinv) by the modulus size n_sz, but qat_rsa_setkey_crt() al…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 25, 2026
• High 7.8
  CVE-2026-68145

  iomap: fix out-of-bounds bitmap_set() with zero-length range

  In the Linux kernel, the following vulnerability has been resolved: iomap: fix out-of-bounds bitmap_set() with zero-length range ifs_set_range_dirty() and ifs_set_range_uptodate() compute last_blk as (off + len - 1) >> i_blkbits. When off is 0 and len is 0, t…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Aug 10, 2026
• High 7.5
  CVE-2026-53391

  NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr

  In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: reject zero-length r_addr in nfs4_decode_mp_ds_addr nfs4_decode_mp_ds_addr() decodes the r_netid and r_addr opaques of a netaddr4 from a GETDEVICEINFO multipath-DS body, then imme…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.5
  CVE-2026-53392

  NFSv4/flexfiles: reject zero filehandle version count

  In the Linux kernel, the following vulnerability has been resolved: NFSv4/flexfiles: reject zero filehandle version count ff_layout_alloc_lseg() decodes the filehandle-version array count from the flexfiles layout body. The value is used as the count for kzal…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 19, 2026
• High 7.5
  CVE-2026-53397

  nfsd: fix posix_acl leak on SETACL decode failure

  In the Linux kernel, the following vulnerability has been resolved: nfsd: fix posix_acl leak on SETACL decode failure nfsaclsvc_decode_setaclargs() and nfs3svc_decode_setaclargs() each call nfs_stream_decode_acl() twice, first for NFS_ACL and then for NFS_DFA…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jul 19, 2026
• High 7.1
  CVE-2026-64298

  NFSv4: include MAY_WRITE in open permission mask for O_TRUNC

  In the Linux kernel, the following vulnerability has been resolved: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC POSIX requires write permission to truncate a file, so an open() that specifies O_TRUNC must be authorized for write access regard…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jul 25, 2026
• Unscored —
  CVE-2025-71147

  KEYS: trusted: Fix a memory leak in tpm2_load_cmd

  In the Linux kernel, the following vulnerability has been resolved: KEYS: trusted: Fix a memory leak in tpm2_load_cmd 'tpm2_load_cmd' allocates a tempoary blob indirectly via 'tpm2_key_decode' but it is not freed in the failure paths. Address this by wrapping…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  Jan 23, 2026
• Unscored —
  CVE-2026-53073

  Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error

  In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and se…

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Jun 24, 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
• Unscored —
  CVE-2026-68480

  x86/bugs: Make Safe-RET robust against interrupt injection

  In the Linux kernel, the following vulnerability has been resolved: x86/bugs: Make Safe-RET robust against interrupt injection An attacker injecting interrupts while the Safe-RET mitigation executes on machines affected by SRSO can neutralize the safe return …

  Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  Aug 6, 2026

References

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  https://access.redhat.com/security/updates/classification/#important
• report
  https://bugzilla.redhat.com/show_bug.cgi?id=2406747
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