CVE-2022-50258— wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds()
Possible ATT&CK Techniques 1AI
T1564.004 · NTFS File AttributesAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 0af29bf7c1ddf5f3c35577409de46ede5e8d7845< 89243a7b0ea19606ba1c2873c9d569026ccb344f | affected |
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< d481fd6064bf215d7c5068e15aa390c3b16c9cd0 | affected | ||
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< 17dbe90e13f52848c460d253f15b765038ec6dc0 | affected | ||
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< d6ef66194bb4a6c18f5b9649bf62597909b040e4 | affected | ||
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< 3a3a5e3f94068cd562d62a57da6983c8cd07d53c | affected | ||
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< 881f50d76c3892262730ddf5c894eb00310e736c | affected | ||
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< ba166e0ebdde3dfa833f0a3edaf2b2934d4a87f7 | affected | ||
0af29bf7c1ddf5f3c35577409de46ede5e8d7845< 0a06cadcc2a0044e4a117cc0e61436fc3a0dad69 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2022-50258
Vulnerability Information
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Vulnerability Title
wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix potential stack-out-of-bounds in brcmf_c_preinit_dcmds() This patch fixes a stack-out-of-bounds read in brcmfmac that occurs when 'buf' that is not null-terminated is passed as an argument of strsep() in brcmf_c_preinit_dcmds(). This buffer is filled with a firmware version string by memcpy() in brcmf_fil_iovar_data_get(). The patch ensures buf is null-terminated. Found by a modified version of syzkaller. [ 47.569679][ T1897] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43236b for chip BCM43236/3 [ 47.582839][ T1897] brcmfmac: brcmf_c_process_clm_blob: no clm_blob available (err=-2), device may have limited channels available [ 47.601565][ T1897] ================================================================== [ 47.602574][ T1897] BUG: KASAN: stack-out-of-bounds in strsep+0x1b2/0x1f0 [ 47.603447][ T1897] Read of size 1 at addr ffffc90001f6f000 by task kworker/0:2/1897 [ 47.604336][ T1897] [ 47.604621][ T1897] CPU: 0 PID: 1897 Comm: kworker/0:2 Tainted: G O 5.14.0+ #131 [ 47.605617][ T1897] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014 [ 47.606907][ T1897] Workqueue: usb_hub_wq hub_event [ 47.607453][ T1897] Call Trace: [ 47.607801][ T1897] dump_stack_lvl+0x8e/0xd1 [ 47.608295][ T1897] print_address_description.constprop.0.cold+0xf/0x334 [ 47.609009][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609434][ T1897] ? strsep+0x1b2/0x1f0 [ 47.609863][ T1897] kasan_report.cold+0x83/0xdf [ 47.610366][ T1897] ? strsep+0x1b2/0x1f0 [ 47.610882][ T1897] strsep+0x1b2/0x1f0 [ 47.611300][ T1897] ? brcmf_fil_iovar_data_get+0x3a/0xf0 [ 47.611883][ T1897] brcmf_c_preinit_dcmds+0x995/0xc40 [ 47.612434][ T1897] ? brcmf_c_set_joinpref_default+0x100/0x100 [ 47.613078][ T1897] ? rcu_read_lock_sched_held+0xa1/0xd0 [ 47.613662][ T1897] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 47.614208][ T1897] ? lock_acquire+0x19d/0x4e0 [ 47.614704][ T1897] ? find_held_lock+0x2d/0x110 [ 47.615236][ T1897] ? brcmf_usb_deq+0x1a7/0x260 [ 47.615741][ T1897] ? brcmf_usb_rx_fill_all+0x5a/0xf0 [ 47.616288][ T1897] brcmf_attach+0x246/0xd40 [ 47.616758][ T1897] ? wiphy_new_nm+0x1703/0x1dd0 [ 47.617280][ T1897] ? kmemdup+0x43/0x50 [ 47.617720][ T1897] brcmf_usb_probe+0x12de/0x1690 [ 47.618244][ T1897] ? brcmf_usbdev_qinit.constprop.0+0x470/0x470 [ 47.618901][ T1897] usb_probe_interface+0x2aa/0x760 [ 47.619429][ T1897] ? usb_probe_device+0x250/0x250 [ 47.619950][ T1897] really_probe+0x205/0xb70 [ 47.620435][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.621048][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.621595][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.622209][ T1897] driver_probe_device+0x4e/0x150 [ 47.622739][ T1897] __device_attach_driver+0x1cc/0x2a0 [ 47.623287][ T1897] bus_for_each_drv+0x156/0x1d0 [ 47.623796][ T1897] ? bus_rescan_devices+0x30/0x30 [ 47.624309][ T1897] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 47.624907][ T1897] ? trace_hardirqs_on+0x46/0x160 [ 47.625437][ T1897] __device_attach+0x23f/0x3a0 [ 47.625924][ T1897] ? device_bind_driver+0xd0/0xd0 [ 47.626433][ T1897] ? kobject_uevent_env+0x287/0x14b0 [ 47.627057][ T1897] bus_probe_device+0x1da/0x290 [ 47.627557][ T1897] device_add+0xb7b/0x1eb0 [ 47.628027][ T1897] ? wait_for_completion+0x290/0x290 [ 47.628593][ T1897] ? __fw_devlink_link_to_suppliers+0x5a0/0x5a0 [ 47.629249][ T1897] usb_set_configuration+0xf59/0x16f0 [ 47.629829][ T1897] usb_generic_driver_probe+0x82/0xa0 [ 47.630385][ T1897] usb_probe_device+0xbb/0x250 [ 47.630927][ T1897] ? usb_suspend+0x590/0x590 [ 47.631397][ T1897] really_probe+0x205/0xb70 [ 47.631855][ T1897] ? driver_allows_async_probing+0x130/0x130 [ 47.632469][ T1897] __driver_probe_device+0x311/0x4b0 [ 47.633002][ ---truncated---
Source: CVE Program / CVE List V5
CVSS Information
N/A
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
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_c_preinit_dcmds函数中未对buf进行空终止处理，可能导致栈缓冲区溢出读取。
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
II. Public POCs for CVE-2022-50258
| # | POC Description | Source Link | Shenlong Link |
|---|
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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-2023-53213 | 8.1 HIGH | wifi: brcmfmac: slab-out-of-bounds read in brcmf_get_assoc_ies() |
| CVE-2023-53186 | 8.1 HIGH | skbuff: Fix a race between coalescing and releasing SKBs |
| CVE-2022-50303 | 7.8 HIGH | drm/amdkfd: Fix double release compute pasid |
| CVE-2023-53254 | 7.8 HIGH | cacheinfo: Fix shared_cpu_map to handle shared caches at different levels |
| CVE-2023-53170 | 7.8 HIGH | net: dsa: Removed unneeded of_node_put in felix_parse_ports_node |
| CVE-2023-53252 | 7.8 HIGH | Bluetooth: use RCU for hci_conn_params and iterate safely in hci_sync |
| 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-2023-53189 | 7.8 HIGH | ipv6/addrconf: fix a potential refcount underflow for idev |
| CVE-2023-53216 | 7.8 HIGH | arm64: efi: Make efi_rt_lock a raw_spinlock |
Showing top 20 of 210 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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Same vendor: Linux
- CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev - CVE-2026-74575
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