In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: fix typo in frequency notification The NAN notification is for 5745 MHz which corresponds to channel 149 and not 5475 which is not actually a valid channel. This could result in a NULL pointer dereference in cfg80211_next_nan_dw_notif.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:18587 advisory.

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

    Security Fix(es):

    * kernel: bonding: check xdp prog when set bond mode (CVE-2025-22105)

    * kernel: block: fix resource leak in blk_register_queue() error path (CVE-2025-37980)

    * kernel: dmaengine: idxd: fix memory leak in error handling path of idxd_alloc (CVE-2025-38015)

    * kernel: espintcp: remove encap socket caching to avoid reference leak (CVE-2025-38097)

    * kernel: bpf: fix ktls panic with sockmap (CVE-2025-38166)

    * kernel: bpf: Do not include stack ptr register in precision backtracking bookkeeping (CVE-2025-38279)

    * kernel: nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails (CVE-2025-38400)

    * kernel: nvmet: fix memory leak of bio integrity (CVE-2025-38405)

    * kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto() (CVE-2025-38441)

    * kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime (CVE-2025-38470)

    * kernel: fs: writeback: fix use-after-free in __mark_inode_dirty() (CVE-2025-39866)

    * kernel: dm: fix NULL pointer dereference in __dm_suspend() (CVE-2025-40134)

    * kernel: wifi: mac80211_hwsim: fix typo in frequency notification (CVE-2026-23040)

    * kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes     linked from 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 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:18134 advisory.

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

    Security Fix(es):

    * kernel: tcp_bpf: Fix the sk_mem_uncharge logic in tcp_bpf_sendmsg (CVE-2024-56633)

    * kernel: KVM: x86: Load DR6 with guest value only before entering .vcpu_run() loop (CVE-2025-21839)

    * kernel: block: fix resource leak in blk_register_queue() error path (CVE-2025-37980)

    * kernel: dmaengine: idxd: fix memory leak in error handling path of idxd_alloc (CVE-2025-38015)

    * kernel: espintcp: remove encap socket caching to avoid reference leak (CVE-2025-38097)

    * kernel: bpf: fix ktls panic with sockmap (CVE-2025-38166)

    * kernel: bpf: Check rcu_read_lock_trace_held() in bpf_map_lookup_percpu_elem() (CVE-2025-38202)

    * kernel: bpf: Do not include stack ptr register in precision backtracking bookkeeping (CVE-2025-38279)

    * kernel: ring-buffer: Do not trigger WARN_ON() due to a commit_overrun (CVE-2025-38267)

    * kernel: phy: qcom-qmp-usb: Fix an NULL vs IS_ERR() bug (CVE-2025-38275)

    * kernel: ftrace: Fix UAF when lookup kallsym after ftrace disabled (CVE-2025-38346)

    * kernel: ACPICA: fix acpi operand cache leak in dswstate.c (CVE-2025-38345)

    * kernel: nvmet: fix memory leak of bio integrity (CVE-2025-38405)

    * kernel: netfilter: flowtable: account for Ethernet header in nf_flow_pppoe_proto() (CVE-2025-38441)

    * kernel: net: vlan: fix VLAN 0 refcount imbalance of toggling filtering during runtime (CVE-2025-38470)

    * kernel: fs: writeback: fix use-after-free in __mark_inode_dirty() (CVE-2025-39866)

    * kernel: PCI/AER: Avoid NULL pointer dereference in aer_ratelimit() (CVE-2025-40034)

    * kernel: dm: fix NULL pointer dereference in __dm_suspend() (CVE-2025-40134)

    * kernel: Revert NFSD: Remove the cap on number of operations per NFSv4 COMPOUND (CVE-2025-40210)

    * kernel: Linux kernel MPTCP: Privilege escalation or denial of service via use-after-free in timer     handling (CVE-2025-40257)

    * kernel: smb: client: fix potential cfid UAF in smb2_query_info_compound (CVE-2025-40320)

    * kernel: wifi: mac80211_hwsim: fix typo in frequency notification (CVE-2026-23040)

    * kernel: Kernel: Privilege escalation or denial of service in nf_tables via inverted element activity     check (CVE-2026-23111)

    * kernel: Linux kernel: Denial of Service in ice driver due to race condition during VSI rebuild     (CVE-2026-23210)

    * kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes     linked from 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: wifi: mac80211_hwsim: fix typo in     frequency notification The NAN notification is for 5745 MHz which corresponds to channel 149 and not 5475     which is not actually a valid channel. This could result in a NULL pointer dereference in     cfg80211_next_nan_dw_notif. (CVE-2026-23040)

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

ID	Name	Product	Family	Severity
315372	RHEL 9 : kernel (RHSA-2026:18587)	Nessus	Red Hat Local Security Checks	high
315310	RHEL 10 : kernel (RHSA-2026:18134)	Nessus	Red Hat Local Security Checks	high
297932	Linux Distros Unpatched Vulnerability : CVE-2026-23040	Nessus	Misc.	high

Detections

Analytics

CVE-2026-23040

high

Tenable Plugins

high

high

high