{ "schema_version": "1.6.1", "id": "RPI-CVE-2024-40911", "modified": "2026-10-09T11:39:44Z", "upstream": [ "CVE-2024-40911" ], "published": "2024-07-12T12:21:19Z", "summary": "wifi: cfg80211: Lock wiphy in cfg80211_get_station", "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: Lock wiphy in cfg80211_get_station\n\nWiphy should be locked before calling rdev_get_station() (see lockdep\nassert in ieee80211_get_station()).\n\nThis fixes the following kernel NULL dereference:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000050\n Mem abort info:\n ESR = 0x0000000096000006\n EC = 0x25: DABT (current EL), IL = 32 bits\n SET = 0, FnV = 0\n EA = 0, S1PTW = 0\n FSC = 0x06: level 2 translation fault\n Data abort info:\n ISV = 0, ISS = 0x00000006\n CM = 0, WnR = 0\n user pgtable: 4k pages, 48-bit VAs, pgdp=0000000003001000\n [0000000000000050] pgd=0800000002dca003, p4d=0800000002dca003, pud=08000000028e9003, pmd=0000000000000000\n Internal error: Oops: 0000000096000006 [#1] SMP\n Modules linked in: netconsole dwc3_meson_g12a dwc3_of_simple dwc3 ip_gre gre ath10k_pci ath10k_core ath9k ath9k_common ath9k_hw ath\n CPU: 0 PID: 1091 Comm: kworker/u8:0 Not tainted 6.4.0-02144-g565f9a3a7911-dirty #705\n Hardware name: RPT (r1) (DT)\n Workqueue: bat_events batadv_v_elp_throughput_metric_update\n pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : ath10k_sta_statistics+0x10/0x2dc [ath10k_core]\n lr : sta_set_sinfo+0xcc/0xbd4\n sp : ffff000007b43ad0\n x29: ffff000007b43ad0 x28: ffff0000071fa900 x27: ffff00000294ca98\n x26: ffff000006830880 x25: ffff000006830880 x24: ffff00000294c000\n x23: 0000000000000001 x22: ffff000007b43c90 x21: ffff800008898acc\n x20: ffff00000294c6e8 x19: ffff000007b43c90 x18: 0000000000000000\n x17: 445946354d552d78 x16: 62661f7200000000 x15: 57464f445946354d\n x14: 0000000000000000 x13: 00000000000000e3 x12: d5f0acbcebea978e\n x11: 00000000000000e3 x10: 000000010048fe41 x9 : 0000000000000000\n x8 : ffff000007b43d90 x7 : 000000007a1e2125 x6 : 0000000000000000\n x5 : ffff0000024e0900 x4 : ffff800000a0250c x3 : ffff000007b43c90\n x2 : ffff00000294ca98 x1 : ffff000006831920 x0 : 0000000000000000\n Call trace:\n ath10k_sta_statistics+0x10/0x2dc [ath10k_core]\n sta_set_sinfo+0xcc/0xbd4\n ieee80211_get_station+0x2c/0x44\n cfg80211_get_station+0x80/0x154\n batadv_v_elp_get_throughput+0x138/0x1fc\n batadv_v_elp_throughput_metric_update+0x1c/0xa4\n process_one_work+0x1ec/0x414\n worker_thread+0x70/0x46c\n kthread+0xdc/0xe0\n ret_from_fork+0x10/0x20\n Code: a9bb7bfd 910003fd a90153f3 f9411c40 (f9402814)\n\nThis happens because STA has time to disconnect and reconnect before\nbatadv_v_elp_throughput_metric_update() delayed work gets scheduled. In\nthis situation, ath10k_sta_state() can be in the middle of resetting\narsta data when the work queue get chance to be scheduled and ends up\naccessing it. Locking wiphy prevents that.", "severity": [ { "type": "CVSS_V3", "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H" } ], "affected": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.1.21-1+rpt1", "1:6.1.47-1+rpt2", "1:6.1.47-1+rpt4", "1:6.1.54-1+rpt2", "1:6.1.58-1+rpt2", "1:6.1.63-1+rpt1", "1:6.1.73-1+rpt1", "1:6.6.20-1+rpt1", "1:6.6.28-1+rpt1", "1:6.6.31-1+rpt1" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.1.0-rpi1-rpi-v6", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v7l", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi1-rpi-v8", "binary_version": "1:6.1.21-1+rpt1" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v6", "binary_version": "1:6.1.47-1+rpt2" }, { "binary_name": "linux-image-6.1.0-rpi2-rpi-v7", "binary_version": "1:6.1.47-1+rpt2" }, { 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"linux_commit": null, "upstream_version": "6.1.73", "assessment": "upstream version (no usable Linux commit)", "upstream_fixed": "6.1.95" }, "1:6.6.20-1+rpt1": { "linux_commit": "6f16847710cc0502450788b9f12f0a14d3429668", "upstream_version": "6.6.20", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.35" }, "1:6.6.28-1+rpt1": { "linux_commit": "0c341f47adc3578cd5f817aa20ee2b7f9ae6b23e", "upstream_version": "6.6.28", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.35" }, "1:6.6.31-1+rpt1": { "linux_commit": "c1432b4bae5b6582f4d32ba381459f33c34d1424", "upstream_version": "6.6.31", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.6.35" } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2024-40911" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/dfd84ce41663be9ca3f69bd657c45f49b69344d9" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/6d540b0317901535275020bd4ac44fac6439ca76" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/0ccc63958d8373e15a69f4f8069f3e78f7f3898a" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/43e1eefb0b2094e2281150d87d09e8bc872b9fba" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/642f89daa34567d02f312d03e41523a894906dae" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-08-05T11:52:36Z", "severity": { "source": "kernel CNA", "cvss_v3_score": 8.8, "cvss_v3_severity": "High", "scenario": "AV:A - The vulnerable path is only reachable via batman-adv's ELP throughput worker querying a WiFi neighbour, and the race window is opened by that neighbour's 802.11 disassociation/reassociation. This requires the attacker to be a link-layer WiFi peer of the mesh node, i.e. within radio range on the same segment.\nAC:L - The attacker directly controls one side of the race by repeatedly disconnecting and reconnecting, which is precisely what triggers ath10k_sta_state()'s memset(arsta) / sta_info teardown, while the ELP metric worker fires on a fixed ~500ms interval per neighbour and can be hit by simple repetition. The commit message confirms the race occurs even in ordinary operation without any attacker effort.\nPR:N - The attacker is a WiFi peer with no privileges or account on the victim mesh node, and batman-adv's typical deployments (community mesh, IBSS/802.11s links) are frequently unauthenticated/open. Being an ELP neighbour confers no privilege on the vulnerable system itself.\nUI:N - The batman-adv ELP worker polls neighbour throughput automatically on a timer with no operator involvement. The attacker only has to associate and drop the link.\nS:U - The corruption and crash occur entirely within the kernel of the affected mesh node, with no crossing of a virtualization, IOMMU, or sandbox boundary. Impact stays within the same security authority.\nC:H - Because neither the wiphy mutex nor an RCU read section is held, sta_info_get_bss() hands back a pointer that __sta_info_destroy_part2()/sta_info_free() can kfree() concurrently, so sta_set_sinfo() and the driver sta_statistics callback read a freed struct sta_info and chase its embedded pointers. A use-after-free read of a heap object whose contents the attacker can groom by reassociating yields an arbitrary-read primitive.\nI:H - The same use-after-free lets the attacker control the reallocated object's contents, and the driver callback dereferences pointers taken from it (e.g. arsta->arvif->ar and driver ops), giving a corruption/control-flow primitive. Per kernel scoring guidance, use-after-free and type-confusion of a freed structure are treated as High integrity impact.\nA:H - The reported and reproducible outcome is a kernel NULL pointer dereference oops in ath10k_sta_statistics(), panicking the mesh node. The attacker can retrigger it at will by cycling association, giving persistent denial of service." } } }