In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in le_read_features_complete This fixes the following backtrace caused by hci_conn being freed before le_read_features_complete but after hci_le_read_remote_features_sync so hci_conn_del -> hci_cmd_sync_dequeue is not able to prevent it: ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] BUG: KASAN: slab-use-after-free in hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline] BUG: KASAN: slab-use-after-free in le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344 Write of size 4 at addr ffff8880796b0010 by task kworker/u9:0/52 CPU: 0 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: hci0 hci_cmd_sync_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:194 [inline] kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:200 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline] le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344 hci_cmd_sync_work+0x1ff/0x430 net/bluetooth/hci_sync.c:334 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 </TASK> Allocated by task 5932: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone mm/kasan/common.c:400 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] __hci_conn_add+0xf8/0x1c70 net/bluetooth/hci_conn.c:963 hci_conn_add_unset+0x76/0x100 net/bluetooth/hci_conn.c:1084 le_conn_complete_evt+0x639/0x1f20 net/bluetooth/hci_event.c:5714 hci_le_enh_conn_complete_evt+0x23d/0x380 net/bluetooth/hci_event.c:5861 hci_le_meta_evt+0x357/0x5e0 net/bluetooth/hci_event.c:7408 hci_event_func net/bluetooth/hci_event.c:7716 [inline] hci_event_packet+0x685/0x11c0 net/bluetooth/hci_event.c:7773 hci_rx_work+0x2c9/0xeb0 net/bluetooth/hci_core.c:4076 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Freed by task 5932: kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 __kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6663 [inline] kfree+0x2f8/0x6e0 mm/slub.c:6871 device_release+0xa4/0x240 drivers/base/core.c:2565 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x1e7/0x590 lib/kobject. ---truncated---

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-23329 advisory.

    - crypto: ccp - copy IV using skcipher ivsize (CKI Backport Bot) [RHEL-188463] {CVE-2026-53016}
    - futex/requeue: Revert 'Prevent NULL pointer dereference in remove_waiter() on self-deadlock'' (CKI     Backport Bot) [RHEL-193250] {CVE-2026-53166}
    - futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock (CKI Backport Bot)     [RHEL-193250] {CVE-2026-43499}
    - locking/rtmutex: Skip remove_waiter() when waiter is not enqueued (CKI Backport Bot) [RHEL-193153]     {CVE-2026-43499}
    - rtmutex: Use waiter::task instead of current in remove_waiter() (CKI Backport Bot) [RHEL-193153]     {CVE-2026-43499}
    - md/bitmap: fix GPF in write_page caused by resize race (Nigel Croxon) [RHEL-174092] {CVE-2026-43163}
    - KVM: x86: Fix shadow paging use-after-free due to unexpected role (Paolo Bonzini) [RHEL-192407]     {CVE-2026-53359}
    - KVM: x86: Fix shadow paging use-after-free due to unexpected GFN (CKI Backport Bot) [RHEL-186698]     {CVE-2026-46113}
    - net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (CKI Backport     Bot) [RHEL-183007] {CVE-2025-71066}
    - sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL (CKI Backport Bot)     [RHEL-179854] {CVE-2026-46227}
    - eventpoll: Fix semi-unbounded recursion (Ian Kent) [RHEL-180776] {CVE-2025-38614}
    - eventpoll: fix ep_remove struct eventpoll / struct file UAF (Ian Kent) [RHEL-180776] {CVE-2026-46242}
    - eventpoll: defer struct eventpoll free to RCU grace period (Ian Kent) [RHEL-173832] {CVE-2026-43074}
    - smb/client: fix out-of-bounds read in smb2_compound_op() (Paulo Alcantara) [RHEL-180048]     {CVE-2026-46155}
    - procfs: fix missing RCU protection when reading real_parent in do_task_stat() (CKI Backport Bot)     [RHEL-181902] {CVE-2026-46259}
    - net/ipv6: ioam6: prevent schema length wraparound in trace fill (Antoine Tenart) [RHEL-174786]     {CVE-2026-43341}
    - net/mana: Null service_wq on setup error to prevent double destroy (CKI Backport Bot) [RHEL-180277]     {CVE-2026-43276}
    - net: mana: Fix double destroy_workqueue on service rescan PCI path (CKI Backport Bot) [RHEL-180277]     {CVE-2026-43276}
    - fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CKI Backport Bot) [RHEL-189491]     {CVE-2026-43112}
    - Enable workaround for ARM64 ERRATUM 4118414 (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: errata: Mitigate TLBI errata on Microsoft Azure Cobalt 100 CPU (Mark Salter) [RHEL-183592]     {CVE-2025-10263}
    - arm64: errata: Mitigate TLBI errata on NVIDIA Olympus CPU (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: errata: Mitigate TLBI errata on various Arm CPUs (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: cputype: Add C1-Ultra definitions (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: cputype: Add C1-Premium definitions (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - arm64: cputype: Add C1-Pro definitions (Mark Salter) [RHEL-183592] {CVE-2025-10263}
    - KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry (CKI Backport Bot)     [RHEL-183965] {CVE-2026-46316}
    - netfilter: nft_inner: Fix IPv6 inner_thoff desync (CKI Backport Bot) [RHEL-181936] {CVE-2026-46244}
    - drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CKI Backport Bot)     [RHEL-179912] {CVE-2026-46209}
    - rxrpc: Fix rxrpc_input_call_event() to only unshare DATA packets (CKI Backport Bot) [RHEL-179566]     {CVE-2026-45998}
    - rxrpc: Fix potential UAF after skb_unshare() failure (CKI Backport Bot) [RHEL-179566] {CVE-2026-45998}
    - RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() (CKI Backport Bot) [RHEL-180001]     {CVE-2026-46176}
    - crypto: tegra - Add missing CRYPTO_ALG_ASYNC (Vladislav Dronov) [RHEL-182759] {CVE-2026-31739}
    - RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path (CKI Backport Bot) [RHEL-179965]     {CVE-2026-46189}
    - ALSA: aloop: Fix peer runtime UAF during format-change stop (CKI Backport Bot) [RHEL-179317]     {CVE-2026-46090}
    - ALSA: usb-audio: Add sanity check for OOB writes at silencing (CKI Backport Bot) [RHEL-173937]     {CVE-2026-43279}
    - tcp: fix potential race in tcp_v6_syn_recv_sock() (Paolo Abeni) [RHEL-174242] {CVE-2026-43198}
    - scsi: qla2xxx: Completely fix fcport double free (Ewan D. Milne) [RHEL-179755] {CVE-2026-43414}
    - RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CKI Backport Bot) [RHEL-180155]     {CVE-2026-46117}
    - RDMA/iwcm: Fix workqueue list corruption by removing work_list (CKI Backport Bot) [RHEL-179665]     {CVE-2026-45898}
    - rxrpc: fix RESPONSE authenticator parser OOB read (CKI Backport Bot) [RHEL-171456] {CVE-2026-31636}
    - nvmet-tcp: fix race between ICReq handling and queue teardown (CKI Backport Bot) [RHEL-180106]     {CVE-2026-46135}
    - RDMA/mana: Validate rx_hash_key_len (CKI Backport Bot) [RHEL-180090] {CVE-2026-46145}
    - ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (Guillaume Nault) [RHEL-172675]     {CVE-2026-43038}
    - net/sched: fix pedit partial COW leading to page cache corruption (Ivan Vecera) [RHEL-177380]     {CVE-2026-46331}
    - exit: prevent preemption of oopsing TASK_DEAD task (CKI Backport Bot) [RHEL-180009] {CVE-2026-46173}
    - crypto: caam - fix overflow on long hmac keys (CKI Backport Bot) [RHEL-179769] {CVE-2026-43330}

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 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:23329 advisory.

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

    Security Fix(es):

    * kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al     (CVE-2025-38653)

    * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)

    * kernel: smb: client: fix OOB reads parsing symlink error response (CVE-2026-31613)

    * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)

    * kernel: netfilter: flowtable: strictly check for maximum number of actions (CVE-2026-43329)

    * kernel: Bluetooth: hci_sync: Fix UAF in le_read_features_complete (CVE-2026-43322)

    * kernel: Linux kernel: smb: client: reject userspace cifs.spnego descriptions (CVE-2026-46243)

    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.

  - In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Fix UAF in     le_read_features_complete This fixes the following backtrace caused by hci_conn being freed before     le_read_features_complete but after hci_le_read_remote_features_sync so hci_conn_del ->     hci_cmd_sync_dequeue is not able to prevent it:
    ================================================================== BUG: KASAN: slab-use-after-free in     instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-use-after-free in     atomic_dec_and_test include/linux/atomic/atomic-instrumented.h:1383 [inline] BUG: KASAN: slab-use-after-     free in hci_conn_drop include/net/bluetooth/hci_core.h:1688 [inline] BUG: KASAN: slab-use-after-free in     le_read_features_complete+0x5b/0x340 net/bluetooth/hci_sync.c:7344 Write of size 4 at addr     ffff8880796b0010 by task kworker/u9:0/52 CPU: 0 UID: 0 PID: 52 Comm: kworker/u9:0 Not tainted syzkaller #0     PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025     Workqueue: hci0 hci_cmd_sync_work Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline]     dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline]     print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595     check_region_inline mm/kasan/generic.c:194 [inline] kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:200     instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec_and_test     include/linux/atomic/atomic-instrumented.h:1383 [inline] hci_conn_drop     include/net/bluetooth/hci_core.h:1688 [inline] le_read_features_complete+0x5b/0x340     net/bluetooth/hci_sync.c:7344 hci_cmd_sync_work+0x1ff/0x430 net/bluetooth/hci_sync.c:334     process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257 process_scheduled_works kernel/workqueue.c:3340     [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421 kthread+0x3c5/0x780 kernel/kthread.c:463     ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30     arch/x86/entry/entry_64.S:246 </TASK> Allocated by task 5932: kasan_save_stack+0x33/0x60     mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 poison_kmalloc_redzone     mm/kasan/common.c:400 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417 kmalloc_noprof     include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline]
    __hci_conn_add+0xf8/0x1c70 net/bluetooth/hci_conn.c:963 hci_conn_add_unset+0x76/0x100     net/bluetooth/hci_conn.c:1084 le_conn_complete_evt+0x639/0x1f20 net/bluetooth/hci_event.c:5714     hci_le_enh_conn_complete_evt+0x23d/0x380 net/bluetooth/hci_event.c:5861 hci_le_meta_evt+0x357/0x5e0     net/bluetooth/hci_event.c:7408 hci_event_func net/bluetooth/hci_event.c:7716 [inline]     hci_event_packet+0x685/0x11c0 net/bluetooth/hci_event.c:7773 hci_rx_work+0x2c9/0xeb0     net/bluetooth/hci_core.c:4076 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257     process_scheduled_works kernel/workqueue.c:3340 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421     kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158     ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Freed by task 5932: kasan_save_stack+0x33/0x60     mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 __kasan_save_free_info+0x3b/0x60     mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object     mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:284 kasan_slab_free     include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2540 [inline] slab_free mm/slub.c:6663     [inline] kfree+0x2f8/0x6e0 mm/slub.c:6871 device_release+0xa4/0x240 drivers/base/core.c:2565     kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put     include/linux/kref.h:65 [inline] kobject_put+0x1e7/0x590 lib/kobject. ---truncated--- (CVE-2026-43322)

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

ID	Name	Product	Family	Severity
331816	Oracle Linux 10 : kernel (ELSA-2026-23329)	Nessus	Oracle Linux Local Security Checks	high
319529	RHEL 10 : kernel (RHSA-2026:23329)	Nessus	Red Hat Local Security Checks	high
315712	Linux Distros Unpatched Vulnerability : CVE-2026-43322	Nessus	Misc.	high

Detections

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CVE-2026-43322

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Tenable Plugins

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