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

  - wifi: mac80211: fix NULL deref in mesh_matches_local() mesh_matches_local() unconditionally dereferences     ie->mesh_config to compare mesh configuration parameters. When called from mesh_rx_csa_frame(), the parsed     action-frame elements may not contain a Mesh Configuration IE, leaving ie->mesh_config NULL and triggering     a kernel NULL pointer dereference. The other two callers are already safe: - ieee80211_mesh_rx_bcn_presp()     checks !elems->mesh_config before calling mesh_matches_local() - mesh_plink_get_event() is only reached     through mesh_process_plink_frame(), which checks !elems->mesh_config, too mesh_rx_csa_frame() is the only     caller that passes raw parsed elements to mesh_matches_local() without guarding mesh_config. An adjacent     attacker can exploit this by sending a crafted CSA action frame that includes a valid Mesh ID IE but omits     the Mesh Configuration IE, crashing the kernel. The captured crash log: Oops: general protection fault,     probably for non-canonical address ... KASAN: null-ptr-deref in range     [0x0000000000000000-0x0000000000000007] Workqueue: events_unbound cfg80211_wiphy_work [...] Call Trace:
    <TASK> ? __pfx_mesh_matches_local (net/mac80211/mesh.c:65) ieee80211_mesh_rx_queued_mgmt     (net/mac80211/mesh.c:1686) [...] ieee80211_iface_work (net/mac80211/iface.c:1754     net/mac80211/iface.c:1802) [...] cfg80211_wiphy_work (net/wireless/core.c:426) process_one_work     (net/kernel/workqueue.c:3280) ? assign_work (net/kernel/workqueue.c:1219) worker_thread     (net/kernel/workqueue.c:3352) ? __pfx_worker_thread (net/kernel/workqueue.c:3385) kthread     (net/kernel/kthread.c:436) [...] ret_from_fork_asm (net/arch/x86/entry/entry_64.S:255) </TASK> This patch     adds a NULL check for ie->mesh_config at the top of mesh_matches_local() to return false early when the     Mesh Configuration IE is absent. (CVE-2026-23396)

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

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Linux Distros Unpatched Vulnerability : CVE-2026-23396

medium Nessus Plugin ID 303883

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.4 Apr 4, 2026, 11:10 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202604042310
Version 1.3 Apr 3, 2026, 8:06 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202604030806
Version 1.2 Mar 31, 2026, 4:03 AM CVSS metrics ("CVSSv2 score" set to 4.9) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C") CVSS metrics ("CVSSv3 score" set to 5.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H") CVSSv2 severity (based on CVE-2026-23396, severity decreased from "High" to "Medium") CVSSv3 severity (based on None, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202603310403
Version 1.1 Mar 27, 2026, 2:12 PM New Plugin Feed: 202603271412