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CVE-2023-53213— wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()

Quick assessment

Affected

Linux Linux

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于brcmf_get_assoc_ies函数中未检查assoc_info的req_len大小，可能导致越界读取。

CVSS 8.1 · High EPSS 0.24% · P15 Updated Aug 05, 2026

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 20

Vendor	Product	Version Range	Status
Linux	Linux	`cf2b448852abd47cee21007b8313fbf962bf3c9a< ac5305e5d227b9af3aae25fa83380d3ff0225b73`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< 39f9bd880abac6068bedb24a4e16e7bd26bf92da`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< 425eea395f1f5ae349fb55f7fe51d833a5324bfe`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< 549825602e3e6449927ca1ea1a08fd89868439df`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< 936a23293bbb3332bdf4cdb9c1496e80cb0bc2c8`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< e29661611e6e71027159a3140e818ef3b99f32dd`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< 228186629ea970cc78b7d7d5f593f2d32fddf9f6`	affected
		`cf2b448852abd47cee21007b8313fbf962bf3c9a< 21bee3e649d87f78fe8aef6ae02edd3d6f310fd0`	affected
… +12 more rows

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I. Basic Information for CVE-2023-53213

Vulnerability Information

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Vulnerability Title

wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()

Source: CVE Program / CVE List V5

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies() Fix a slab-out-of-bounds read that occurs in kmemdup() called from brcmf_get_assoc_ies(). The bug could occur when assoc_info->req_len, data from a URB provided by a USB device, is bigger than the size of buffer which is defined as WL_EXTRA_BUF_MAX. Add the size check for req_len/resp_len of assoc_info. Found by a modified version of syzkaller. [ 46.592467][ T7] ================================================================== [ 46.594687][ T7] BUG: KASAN: slab-out-of-bounds in kmemdup+0x3e/0x50 [ 46.596572][ T7] Read of size 3014656 at addr ffff888019442000 by task kworker/0:1/7 [ 46.598575][ T7] [ 46.599157][ T7] CPU: 0 PID: 7 Comm: kworker/0:1 Tainted: G O 5.14.0+ #145 [ 46.601333][ T7] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 46.604360][ T7] Workqueue: events brcmf_fweh_event_worker [ 46.605943][ T7] Call Trace: [ 46.606584][ T7] dump_stack_lvl+0x8e/0xd1 [ 46.607446][ T7] print_address_description.constprop.0.cold+0x93/0x334 [ 46.608610][ T7] ? kmemdup+0x3e/0x50 [ 46.609341][ T7] kasan_report.cold+0x79/0xd5 [ 46.610151][ T7] ? kmemdup+0x3e/0x50 [ 46.610796][ T7] kasan_check_range+0x14e/0x1b0 [ 46.611691][ T7] memcpy+0x20/0x60 [ 46.612323][ T7] kmemdup+0x3e/0x50 [ 46.612987][ T7] brcmf_get_assoc_ies+0x967/0xf60 [ 46.613904][ T7] ? brcmf_notify_vif_event+0x3d0/0x3d0 [ 46.614831][ T7] ? lock_chain_count+0x20/0x20 [ 46.615683][ T7] ? mark_lock.part.0+0xfc/0x2770 [ 46.616552][ T7] ? lock_chain_count+0x20/0x20 [ 46.617409][ T7] ? mark_lock.part.0+0xfc/0x2770 [ 46.618244][ T7] ? lock_chain_count+0x20/0x20 [ 46.619024][ T7] brcmf_bss_connect_done.constprop.0+0x241/0x2e0 [ 46.620019][ T7] ? brcmf_parse_configure_security.isra.0+0x2a0/0x2a0 [ 46.620818][ T7] ? __lock_acquire+0x181f/0x5790 [ 46.621462][ T7] brcmf_notify_connect_status+0x448/0x1950 [ 46.622134][ T7] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 46.622736][ T7] ? brcmf_cfg80211_join_ibss+0x7b0/0x7b0 [ 46.623390][ T7] ? find_held_lock+0x2d/0x110 [ 46.623962][ T7] ? brcmf_fweh_event_worker+0x19f/0xc60 [ 46.624603][ T7] ? mark_held_locks+0x9f/0xe0 [ 46.625145][ T7] ? lockdep_hardirqs_on_prepare+0x3e0/0x3e0 [ 46.625871][ T7] ? brcmf_cfg80211_join_ibss+0x7b0/0x7b0 [ 46.626545][ T7] brcmf_fweh_call_event_handler.isra.0+0x90/0x100 [ 46.627338][ T7] brcmf_fweh_event_worker+0x557/0xc60 [ 46.627962][ T7] ? brcmf_fweh_call_event_handler.isra.0+0x100/0x100 [ 46.628736][ T7] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 46.629396][ T7] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 46.629970][ T7] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 46.630649][ T7] process_one_work+0x92b/0x1460 [ 46.631205][ T7] ? pwq_dec_nr_in_flight+0x330/0x330 [ 46.631821][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 46.632347][ T7] worker_thread+0x95/0xe00 [ 46.632832][ T7] ? __kthread_parkme+0x115/0x1e0 [ 46.633393][ T7] ? process_one_work+0x1460/0x1460 [ 46.633957][ T7] kthread+0x3a1/0x480 [ 46.634369][ T7] ? set_kthread_struct+0x120/0x120 [ 46.634933][ T7] ret_from_fork+0x1f/0x30 [ 46.635431][ T7] [ 46.635687][ T7] Allocated by task 7: [ 46.636151][ T7] kasan_save_stack+0x1b/0x40 [ 46.636628][ T7] __kasan_kmalloc+0x7c/0x90 [ 46.637108][ T7] kmem_cache_alloc_trace+0x19e/0x330 [ 46.637696][ T7] brcmf_cfg80211_attach+0x4a0/0x4040 [ 46.638275][ T7] brcmf_attach+0x389/0xd40 [ 46.638739][ T7] brcmf_usb_probe+0x12de/0x1690 [ 46.639279][ T7] usb_probe_interface+0x2aa/0x760 [ 46.639820][ T7] really_probe+0x205/0xb70 [ 46.640342][ T7] __driver_probe_device+0 ---truncated---

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Linux kernel 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Linux	Linux	cf2b448852abd47cee21007b8313fbf962bf3c9a ~ ac5305e5d227b9af3aae25fa83380d3ff0225b73	-
Linux	Linux	2.6.37	-

II. Public POCs for CVE-2023-53213

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2023-53213

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https://www.cve.org/CVERecord?id=CVE-2023-53213

Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

CVE-2022-50235	9.8 CRITICAL	NFSD: Protect against send buffer overflow in NFSv2 READDIR
CVE-2022-50335	9.8 CRITICAL	9p: set req refcount to zero to avoid uninitialized usage
CVE-2023-53192	9.8 CRITICAL	vxlan: Fix nexthop hash size
CVE-2023-53253	8.8 HIGH	HID: nvidia-shield: Reference hid_device devm allocation of input_dev name
CVE-2023-53226	8.8 HIGH	wifi: mwifiex: Fix OOB and integer underflow when rx packets
CVE-2022-50241	8.8 HIGH	NFSD: fix use-after-free on source server when doing inter-server copy
CVE-2023-53194	8.4 HIGH	fs/ntfs3: Add length check in indx_get_root
CVE-2023-53186	8.1 HIGH	skbuff: Fix a race between coalescing and releasing SKBs
CVE-2022-50310	7.8 HIGH	ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed
CVE-2023-53254	7.8 HIGH	cacheinfo: Fix shared_cpu_map to handle shared caches at different levels
CVE-2023-53252	7.8 HIGH	Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync
CVE-2023-53170	7.8 HIGH	net: dsa: Removed unneeded of_node_put in felix_parse_ports_node
CVE-2023-53176	7.8 HIGH	serial: 8250: Reinit port->pm on port specific driver unbind
CVE-2023-53178	7.8 HIGH	mm: fix zswap writeback race condition
CVE-2023-53179	7.8 HIGH	netfilter: ipset: add the missing IP_SET_HASH_WITH_NET0 macro for ip_set_hash_netportnet.c
CVE-2023-53184	7.8 HIGH	arm64/sme: Set new vector length before reallocating
CVE-2022-50315	7.8 HIGH	ata: ahci: Match EM_MAX_SLOTS with SATA_PMP_MAX_PORTS
CVE-2023-53187	7.8 HIGH	btrfs: fix use-after-free of new block group that became unused
CVE-2025-39800	7.8 HIGH	btrfs: abort transaction on unexpected eb generation at btrfs_copy_root()
CVE-2022-50286	7.8 HIGH	ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline

Showing top 20 of 210 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux

Same vendor: Linux

V. Comments for CVE-2023-53213

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2023-53213— wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies()

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 20

I. Basic Information for CVE-2023-53213

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2023-53213

III. Intelligence Information for CVE-2023-53213

Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2023-53213

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