In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in hci_disconnect_all_sync if a connection is deleted by concurrent processing of a controller event. To prevent this the code now tries to iterate over the list backwards to ensure the links are cleanup before its parents, also it no longer relies on a cursor, instead it always uses the last element since hci_abort_conn_sync is guaranteed to call hci_conn_del. UAF crash log: ================================================================== BUG: KASAN: slab-use-after-free in hci_set_powered_sync (net/bluetooth/hci_sync.c:5424) [bluetooth] Read of size 8 at addr ffff888009d9c000 by task kworker/u9:0/124 CPU: 0 PID: 124 Comm: kworker/u9:0 Tainted: G W 6.5.0-rc1+ #10 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014 Workqueue: hci0 hci_cmd_sync_work [bluetooth] Call Trace: <TASK> dump_stack_lvl+0x5b/0x90 print_report+0xcf/0x670 ? __virt_addr_valid+0xdd/0x160 ? hci_set_powered_sync+0x2c9/0x4a0 [bluetooth] kasan_report+0xa6/0xe0 ? hci_set_powered_sync+0x2c9/0x4a0 [bluetooth] ? __pfx_set_powered_sync+0x10/0x10 [bluetooth] hci_set_powered_sync+0x2c9/0x4a0 [bluetooth] ? __pfx_hci_set_powered_sync+0x10/0x10 [bluetooth] ? __pfx_lock_release+0x10/0x10 ? __pfx_set_powered_sync+0x10/0x10 [bluetooth] hci_cmd_sync_work+0x137/0x220 [bluetooth] process_one_work+0x526/0x9d0 ? __pfx_process_one_work+0x10/0x10 ? __pfx_do_raw_spin_lock+0x10/0x10 ? mark_held_locks+0x1a/0x90 worker_thread+0x92/0x630 ? __pfx_worker_thread+0x10/0x10 kthread+0x196/0x1e0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50 </TASK> Allocated by task 1782: kasan_save_stack+0x33/0x60 kasan_set_track+0x25/0x30 __kasan_kmalloc+0x8f/0xa0 hci_conn_add+0xa5/0xa80 [bluetooth] hci_bind_cis+0x881/0x9b0 [bluetooth] iso_connect_cis+0x121/0x520 [bluetooth] iso_sock_connect+0x3f6/0x790 [bluetooth] __sys_connect+0x109/0x130 __x64_sys_connect+0x40/0x50 do_syscall_64+0x60/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task 695: kasan_save_stack+0x33/0x60 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2b/0x50 __kasan_slab_free+0x10a/0x180 __kmem_cache_free+0x14d/0x2e0 device_release+0x5d/0xf0 kobject_put+0xdf/0x270 hci_disconn_complete_evt+0x274/0x3a0 [bluetooth] hci_event_packet+0x579/0x7e0 [bluetooth] hci_rx_work+0x287/0xaa0 [bluetooth] process_one_work+0x526/0x9d0 worker_thread+0x92/0x630 kthread+0x196/0x1e0 ret_from_fork+0x2c/0x50 ==================================================================

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1771239384 advisory.

  - In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in     bfq_exit_icq_bfqq Commit 64dc8c732f5c (block, bfq: fix possible uaf for 'bfqq->bic') will access     'bic->bfqq' in bic_set_bfqq(), however, bfq_exit_icq_bfqq() can free bfqq first, and then call     bic_set_bfqq(), which will cause uaf. Fix the problem by moving bfq_exit_bfqq() behind bic_set_bfqq().
    (CVE-2022-50329)

  - In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix possible uaf for     'bfqq->bic' Our test report a uaf for 'bfqq->bic' in 5.10:
    ================================================================== BUG: KASAN: use-after-free in     bfq_select_queue+0x378/0xa30 CPU: 6 PID: 2318352 Comm: fsstress Kdump: loaded Not tainted     5.10.0-60.18.0.50.h602.kasan.eulerosv2r11.x86_64 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),     BIOS rel-1.12.1-0-ga5cab58-20220320_160524-szxrtosci10000 04/01/2014 Call Trace:
    bfq_select_queue+0x378/0xa30 bfq_dispatch_request+0xe8/0x130 blk_mq_do_dispatch_sched+0x62/0xb0
    __blk_mq_sched_dispatch_requests+0x215/0x2a0 blk_mq_sched_dispatch_requests+0x8f/0xd0
    __blk_mq_run_hw_queue+0x98/0x180 __blk_mq_delay_run_hw_queue+0x22b/0x240 blk_mq_run_hw_queue+0xe3/0x190     blk_mq_sched_insert_requests+0x107/0x200 blk_mq_flush_plug_list+0x26e/0x3c0 blk_finish_plug+0x63/0x90
    __iomap_dio_rw+0x7b5/0x910 iomap_dio_rw+0x36/0x80 ext4_dio_read_iter+0x146/0x190 [ext4]     ext4_file_read_iter+0x1e2/0x230 [ext4] new_sync_read+0x29f/0x400 vfs_read+0x24e/0x2d0 ksys_read+0xd5/0x1b0     do_syscall_64+0x33/0x40 entry_SYSCALL_64_after_hwframe+0x61/0xc6 Commit 3bc5e683c67d (bfq: Split shared     queues on move between cgroups) changes that move process to a new cgroup will allocate a new bfqq to     use, however, the old bfqq and new bfqq can point to the same bic: 1) Initial state, two process with io     in the same cgroup. Process 1 Process 2 (BIC1) (BIC2) |  |  | | | | V | V | bfqq1 bfqq2 2) bfqq1 is     merged to bfqq2. Process 1 Process 2 (BIC1) (BIC2) | | \-------------\| V bfqq1 bfqq2(coop) 3) Process 1     exit, then issue new io(denoce IOA) from Process 2. (BIC2) |  | | V | bfqq2(coop) 4) Before IOA is     completed, move Process 2 to another cgroup and issue io. Process 2 (BIC2)  |\--------------\ | V bfqq2     bfqq3 Now that BIC2 points to bfqq3, while bfqq2 and bfqq3 both point to BIC2. If all the requests are     completed, and Process 2 exit, BIC2 will be freed while there is no guarantee that bfqq2 will be freed     before BIC2. Fix the problem by clearing bfqq->bic while bfqq is detached from bic. (CVE-2022-50488)

  - In the Linux kernel, the following vulnerability has been resolved: wifi: ath10k: Delay the unmapping of     the buffer On WCN3990, we are seeing a rare scenario where copy engine hardware is sending a copy complete     interrupt to the host driver while still processing the buffer that the driver has sent, this is leading     into an SMMU fault triggering kernel panic. This is happening on copy engine channel 3 (CE3) where the     driver normally enqueues WMI commands to the firmware. Upon receiving a copy complete interrupt, host     driver will immediately unmap and frees the buffer presuming that hardware has processed the buffer. In     the issue case, upon receiving copy complete interrupt, host driver will unmap and free the buffer but     since hardware is still accessing the buffer (which in this case got unmapped in parallel), SMMU hardware     will trigger an SMMU fault resulting in a kernel panic. In order to avoid this, as a work around, add a     delay before unmapping the copy engine source DMA buffer. This is conditionally done for WCN3990 and only     for the CE3 channel where issue is seen. Below is the crash signature: wifi smmu error: kernel: [     10.120965] arm-smmu 15000000.iommu: Unhandled context fault: fsr=0x402, iova=0x7fdfd8ac0,     fsynr=0x500003,cbfrsynra=0xc1, cb=6 arm-smmu 15000000.iommu: Unhandled context fault:fsr=0x402,     iova=0x7fe06fdc0, fsynr=0x710003, cbfrsynra=0xc1, cb=6 qcom-q6v5-mss 4080000.remoteproc: fatal error     received: err_qdi.c:1040:EF:wlan_process:0x1:WLAN RT:0x2091: cmnos_thread.c:3998:Asserted in     copy_engine.c:AXI_ERROR_DETECTED:2149 remoteproc remoteproc0: crash detected in 4080000.remoteproc: type     fatal error <3> remoteproc remoteproc0: handling crash #1 in 4080000.remoteproc pc :
    __arm_lpae_unmap+0x500/0x514 lr : __arm_lpae_unmap+0x4bc/0x514 sp : ffffffc011ffb530 x29: ffffffc011ffb590     x28: 0000000000000000 x27: 0000000000000000 x26: 0000000000000004 x25: 0000000000000003 x24:
    ffffffc011ffb890 x23: ffffffa762ef9be0 x22: ffffffa77244ef00 x21: 0000000000000009 x20: 00000007fff7c000     x19: 0000000000000003 x18: 0000000000000000 x17: 0000000000000004 x16: ffffffd7a357d9f0 x15:
    0000000000000000 x14: 00fd5d4fa7ffffff x13: 000000000000000e x12: 0000000000000000 x11: 00000000ffffffff     x10: 00000000fffffe00 x9 : 000000000000017c x8 : 000000000000000c x7 : 0000000000000000 x6 :
    ffffffa762ef9000 x5 : 0000000000000003 x4 : 0000000000000004 x3 : 0000000000001000 x2 : 00000007fff7c000     x1 : ffffffc011ffb890 x0 : 0000000000000000 Call trace: __arm_lpae_unmap+0x500/0x514
    __arm_lpae_unmap+0x4bc/0x514 __arm_lpae_unmap+0x4bc/0x514 arm_lpae_unmap_pages+0x78/0xa4     arm_smmu_unmap_pages+0x78/0x104 __iommu_unmap+0xc8/0x1e4 iommu_unmap_fast+0x38/0x48
    __iommu_dma_unmap+0x84/0x104 iommu_dma_free+0x34/0x50 dma_free_attrs+0xa4/0xd0     ath10k_htt_rx_free+0xc4/0xf4 [ath10k_core] ath10k_core_stop+0x64/0x7c [ath10k_core]     ath10k_halt+0x11c/0x180 [ath10k_core] ath10k_stop+0x54/0x94 [ath10k_core] drv_stop+0x48/0x1c8 [mac80211]     ieee80211_do_open+0x638/0x77c [mac80211] ieee80211_open+0x48/0x5c [mac80211] __dev_open+0xb4/0x174
    __dev_change_flags+0xc4/0x1dc dev_change_flags+0x3c/0x7c devinet_ioctl+0x2b4/0x580 inet_ioctl+0xb0/0x1b4     sock_do_ioctl+0x4c/0x16c compat_ifreq_ioctl+0x1cc/0x35c compat_sock_ioctl+0x110/0x2ac
    __arm64_compat_sys_ioctl+0xf4/0x3e0 el0_svc_common+0xb4/0x17c el0_svc_compat_handler+0x2c/0x58     el0_svc_compat+0x8/0x2c Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.2.0-01387-QCAHLSWMTPLZ-1 (CVE-2022-50700)

  - In the Linux kernel, the following vulnerability has been resolved: tcp: fix a signed-integer-overflow bug     in tcp_add_backlog() The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(),     the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value     of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since     ACK packets are much smaller than the payload. (CVE-2022-50865)

  - In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix uaf for bfqq in     bic_set_bfqq() After commit 64dc8c732f5c (block, bfq: fix possible uaf for 'bfqq->bic'), bic->bfqq will     be accessed in bic_set_bfqq(), however, in some context bic->bfqq will be freed, and bic_set_bfqq() is     called with the freed bic->bfqq. Fix the problem by always freeing bfqq after bic_set_bfqq().
    (CVE-2023-52983)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_2821 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Rocky Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_2720 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:2821 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:2720 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:3267 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: Linux kernel: xHCI driver isochronous event handling race condition leading to data loss or UAF     (CVE-2025-37882)

    * kernel: scsi: mpi3mr: Synchronous access b/w reset and tm thread for reply queue (CVE-2025-37861)

    * kernel: Linux kernel: Memory corruption in Squashfs due to incorrect block size calculation     (CVE-2025-38415)

    * kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing     (CVE-2025-39760)

    * kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial     of service (CVE-2023-53192)

    * kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length     (CVE-2025-39933)

    * kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of     service. (CVE-2025-40271)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel ALSA USB audio driver: Buffer overflow leading to information disclosure and denial     of service (CVE-2025-40269)

    * kernel: ip6_vti: fix slab-use-after-free in decode_session6 (CVE-2023-53821)

    * kernel: ext4: fix use-after-free in ext4_orphan_cleanup (CVE-2022-50673)

    * kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid (CVE-2025-68349)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:2720 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)
      * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)
      * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:3358 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: Linux kernel: xHCI driver isochronous event handling race condition leading to data loss or UAF     (CVE-2025-37882)

    * kernel: scsi: mpi3mr: Synchronous access b/w reset and tm thread for reply queue (CVE-2025-37861)

    * kernel: Linux kernel: Memory corruption in Squashfs due to incorrect block size calculation     (CVE-2025-38415)

    * kernel: Linux kernel: Denial of Service via out-of-bounds read in USB configuration parsing     (CVE-2025-39760)

    * kernel: Linux kernel: Out-of-bounds write in VXLAN due to incorrect nexthop hash size leading to denial     of service (CVE-2023-53192)

    * kernel: smb: client: let recv_done verify data_offset, data_length and remaining_data_length     (CVE-2025-39933)

    * kernel: Linux kernel: Use-after-free in proc_readdir_de() can lead to privilege escalation or denial of     service. (CVE-2025-40271)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel ALSA USB audio driver: Buffer overflow leading to information disclosure and denial     of service (CVE-2025-40269)

    * kernel: ip6_vti: fix slab-use-after-free in decode_session6 (CVE-2023-53821)

    * kernel: ext4: fix use-after-free in ext4_orphan_cleanup (CVE-2022-50673)

    * kernel: NFSv4/pNFS: Clear NFS_INO_LAYOUTCOMMIT in pnfs_mark_layout_stateid_invalid (CVE-2025-68349)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-216:13 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)
      * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)
      * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:2821 advisory.

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)
      * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)
      * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-2720 advisory.

    - Bluetooth: hci_event: Fix checking conn for le_conn_complete_evt (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: hci_sync: Fix UAF on hci_abort_conn_sync (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: hci_conn: Consolidate code for aborting connections (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: Fix printing errors if LE Connection times out (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: hci_conn: Fix not cleaning up on LE Connection failure (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: hci_sync: hold hdev->lock when cleanup hci_conn (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: Move hci_abort_conn to hci_conn.c (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: mgmt: Fix using hci_conn_abort (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: hci_conn: Fix hci_connect_le_sync (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: hci_sync: Cleanup hci_conn if it cannot be aborted (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: hci_event: Fix checking for invalid handle on error status (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: call hci_le_conn_failed with hdev lock in hci_le_conn_failed (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: hci_sync: fix undefined return of hci_disconnect_all_sync() (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - Bluetooth: hci_event: Ignore multiple conn complete events (David Marlin) [RHEL-137111] {CVE-2023-53762}
    - Bluetooth: fix null ptr deref on hci_sync_conn_complete_evt (David Marlin) [RHEL-137111]     {CVE-2023-53762}
    - fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds (CKI Backport Bot) [RHEL-137678]     {CVE-2025-40304}

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:2821 advisory.

    The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with     extremely high determinism requirements.

    Security Fix(es):

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:2720 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match() (CVE-2025-40168)

    * kernel: Linux kernel Bluetooth: Denial of Service due to use-after-free in connection handling     (CVE-2023-53762)

    * kernel: Linux kernel: Out-of-bounds write in fbdev can lead to privilege escalation, information     disclosure, or denial of service. (CVE-2025-40304)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Bluetooth: hci_sync: Fix UAF in hci_disconnect_all_sync Use-after-free can occur in     hci_disconnect_all_sync if a connection is deleted by concurrent processing of a controller event. To     prevent this the code now tries to iterate over the list backwards to ensure the links are cleanup before     its parents, also it no longer relies on a cursor, instead it always uses the last element since     hci_abort_conn_sync is guaranteed to call hci_conn_del. UAF crash log:
    ================================================================== BUG: KASAN: slab-use-after-free in     hci_set_powered_sync (net/bluetooth/hci_sync.c:5424) [bluetooth] Read of size 8 at addr ffff888009d9c000     by task kworker/u9:0/124 CPU: 0 PID: 124 Comm: kworker/u9:0 Tainted: G W 6.5.0-rc1+ #10 Hardware name:
    QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-1.fc38 04/01/2014 Workqueue: hci0 hci_cmd_sync_work     [bluetooth] Call Trace: <TASK> dump_stack_lvl+0x5b/0x90 print_report+0xcf/0x670 ?
    __virt_addr_valid+0xdd/0x160 ? hci_set_powered_sync+0x2c9/0x4a0 [bluetooth] kasan_report+0xa6/0xe0 ?     hci_set_powered_sync+0x2c9/0x4a0 [bluetooth] ? __pfx_set_powered_sync+0x10/0x10 [bluetooth]     hci_set_powered_sync+0x2c9/0x4a0 [bluetooth] ? __pfx_hci_set_powered_sync+0x10/0x10 [bluetooth] ?
    __pfx_lock_release+0x10/0x10 ? __pfx_set_powered_sync+0x10/0x10 [bluetooth] hci_cmd_sync_work+0x137/0x220     [bluetooth] process_one_work+0x526/0x9d0 ? __pfx_process_one_work+0x10/0x10 ?
    __pfx_do_raw_spin_lock+0x10/0x10 ? mark_held_locks+0x1a/0x90 worker_thread+0x92/0x630 ?
    __pfx_worker_thread+0x10/0x10 kthread+0x196/0x1e0 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2c/0x50     </TASK> Allocated by task 1782: kasan_save_stack+0x33/0x60 kasan_set_track+0x25/0x30
    __kasan_kmalloc+0x8f/0xa0 hci_conn_add+0xa5/0xa80 [bluetooth] hci_bind_cis+0x881/0x9b0 [bluetooth]     iso_connect_cis+0x121/0x520 [bluetooth] iso_sock_connect+0x3f6/0x790 [bluetooth] __sys_connect+0x109/0x130
    __x64_sys_connect+0x40/0x50 do_syscall_64+0x60/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task     695: kasan_save_stack+0x33/0x60 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2b/0x50
    __kasan_slab_free+0x10a/0x180 __kmem_cache_free+0x14d/0x2e0 device_release+0x5d/0xf0     kobject_put+0xdf/0x270 hci_disconn_complete_evt+0x274/0x3a0 [bluetooth] hci_event_packet+0x579/0x7e0     [bluetooth] hci_rx_work+0x287/0xaa0 [bluetooth] process_one_work+0x526/0x9d0 worker_thread+0x92/0x630     kthread+0x196/0x1e0 ret_from_fork+0x2c/0x50     ================================================================== (CVE-2023-53762)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
360081	AlmaLinux 9.2 [TuxCare] Security Update: bpftool / kernel / kernel-abi-stablelists / kernel-core / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1771239384)	Nessus	Alma Linux Local Security Checks	Local	high
358496	Rocky Linux 8 [CIQ] Security Update: kernel-rt / kernel-rt-core / kernel-rt-debug / kernel-rt-debug-core / etc Multiple Vulnerabilities (crlsa-2026_2821)	Nessus	Rocky Linux Local Security Checks	Local	high
357831	Rocky Linux 8 [CIQ] Security Update: bpftool / bpftool-debuginfo / kernel / kernel-abi-stablelists / etc Multiple Vulnerabilities (crlsa-2026_2720)	Nessus	Rocky Linux Local Security Checks	Local	high
300443	RockyLinux 8 : kernel-rt (RLSA-2026:2821)	Nessus	Rocky Linux Local Security Checks	Local	high
300154	RockyLinux 8 : kernel (RLSA-2026:2720)	Nessus	Rocky Linux Local Security Checks	Local	high
300052	RHEL 9 : kernel (RHSA-2026:3267)	Nessus	Red Hat Local Security Checks	Local	high
300018	AlmaLinux 8 : kernel (ALSA-2026:2720)	Nessus	Alma Linux Local Security Checks	Local	high
300007	RHEL 9 : kernel-rt (RHSA-2026:3358)	Nessus	Red Hat Local Security Checks	Local	high
299861	MiracleLinux 8 : kernel-4.18.0-553.105.1.el8_10 (AXSA:2026-216:13)	Nessus	Miracle Linux Local Security Checks	Local	high
299774	AlmaLinux 8 : kernel-rt (ALSA-2026:2821)	Nessus	Alma Linux Local Security Checks	Local	high
299335	Oracle Linux 8 : kernel (ELSA-2026-2720)	Nessus	Oracle Linux Local Security Checks	Local	high
299333	RHEL 8 : kernel-rt (RHSA-2026:2821)	Nessus	Red Hat Local Security Checks	Local	high
299165	RHEL 8 : kernel (RHSA-2026:2720)	Nessus	Red Hat Local Security Checks	Local	high
297194	SUSE SLED15 / SLES15 : Security update for the Linux Kernel (SUSE-SU-2026:0315-1)	Nessus	SuSE Local Security Checks	Local	high
296680	SUSE SLES15 / openSUSE 15 : Security update for the Linux Kernel (SUSE-SU-2026:0293-1)	Nessus	SuSE Local Security Checks	Local	high
296676	SUSE SLES15: kernel-azure / kernel-azure-devel / kernel-devel-azure / etc (SUSE-SU-2026:0281-1)	Nessus	SuSE Local Security Checks	Local	high
296481	SUSE SLES15 Security Update : kernel (SUSE-SU-2026:0278-1)	Nessus	SuSE Local Security Checks	Local	high
277724	Linux Distros Unpatched Vulnerability : CVE-2023-53762	Nessus	Misc.	Local	high

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