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CVE-2022-50678— wifi: brcmfmac: fix invalid address access when enabling SCAN log level

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brcmfmac中无效地址访问，可能导致内核崩溃。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 7ccb0529446ae68a8581916bfc95c353306d76ba affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 1c12d47a9017a7745585b57b9b0fdc0d8c50978e affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 56a0ac48634155d2b866b99fba7e1dd8df4e2804 affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 50e45034c5802cedbf5b707364ea76ace29ad984 affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 75995ce1c926ee87bf93d58977c766b4e7744715 affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 4d4dcfa6b4e85a878401f4fbae4cafc88cdcceb4 affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< 826405a911473b6ee8bd2aa891cb2f03a13efa17 affected
efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3< aa666b68e73fc06d83c070d96180b9010cf5a960 affected
… +10 more rows
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I. Basic Information for CVE-2022-50678

Vulnerability Information
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Vulnerability Title
wifi: brcmfmac: fix invalid address access when enabling SCAN log level
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: fix invalid address access when enabling SCAN log level The variable i is changed when setting random MAC address and causes invalid address access when printing the value of pi->reqs[i]->reqid. We replace reqs index with ri to fix the issue. [ 136.726473] Unable to handle kernel access to user memory outside uaccess routines at virtual address 0000000000000000 [ 136.737365] Mem abort info: [ 136.740172] ESR = 0x96000004 [ 136.743359] Exception class = DABT (current EL), IL = 32 bits [ 136.749294] SET = 0, FnV = 0 [ 136.752481] EA = 0, S1PTW = 0 [ 136.755635] Data abort info: [ 136.758514] ISV = 0, ISS = 0x00000004 [ 136.762487] CM = 0, WnR = 0 [ 136.765522] user pgtable: 4k pages, 48-bit VAs, pgdp = 000000005c4e2577 [ 136.772265] [0000000000000000] pgd=0000000000000000 [ 136.777160] Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 136.782732] Modules linked in: brcmfmac(O) brcmutil(O) cfg80211(O) compat(O) [ 136.789788] Process wificond (pid: 3175, stack limit = 0x00000000053048fb) [ 136.796664] CPU: 3 PID: 3175 Comm: wificond Tainted: G O 4.19.42-00001-g531a5f5 #1 [ 136.805532] Hardware name: Freescale i.MX8MQ EVK (DT) [ 136.810584] pstate: 60400005 (nZCv daif +PAN -UAO) [ 136.815429] pc : brcmf_pno_config_sched_scans+0x6cc/0xa80 [brcmfmac] [ 136.821811] lr : brcmf_pno_config_sched_scans+0x67c/0xa80 [brcmfmac] [ 136.828162] sp : ffff00000e9a3880 [ 136.831475] x29: ffff00000e9a3890 x28: ffff800020543400 [ 136.836786] x27: ffff8000b1008880 x26: ffff0000012bf6a0 [ 136.842098] x25: ffff80002054345c x24: ffff800088d22400 [ 136.847409] x23: ffff0000012bf638 x22: ffff0000012bf6d8 [ 136.852721] x21: ffff8000aced8fc0 x20: ffff8000ac164400 [ 136.858032] x19: ffff00000e9a3946 x18: 0000000000000000 [ 136.863343] x17: 0000000000000000 x16: 0000000000000000 [ 136.868655] x15: ffff0000093f3b37 x14: 0000000000000050 [ 136.873966] x13: 0000000000003135 x12: 0000000000000000 [ 136.879277] x11: 0000000000000000 x10: ffff000009a61888 [ 136.884589] x9 : 000000000000000f x8 : 0000000000000008 [ 136.889900] x7 : 303a32303d726464 x6 : ffff00000a1f957d [ 136.895211] x5 : 0000000000000000 x4 : ffff00000e9a3942 [ 136.900523] x3 : 0000000000000000 x2 : ffff0000012cead8 [ 136.905834] x1 : ffff0000012bf6d8 x0 : 0000000000000000 [ 136.911146] Call trace: [ 136.913623] brcmf_pno_config_sched_scans+0x6cc/0xa80 [brcmfmac] [ 136.919658] brcmf_pno_start_sched_scan+0xa4/0x118 [brcmfmac] [ 136.925430] brcmf_cfg80211_sched_scan_start+0x80/0xe0 [brcmfmac] [ 136.931636] nl80211_start_sched_scan+0x140/0x308 [cfg80211] [ 136.937298] genl_rcv_msg+0x358/0x3f4 [ 136.940960] netlink_rcv_skb+0xb4/0x118 [ 136.944795] genl_rcv+0x34/0x48 [ 136.947935] netlink_unicast+0x264/0x300 [ 136.951856] netlink_sendmsg+0x2e4/0x33c [ 136.955781] __sys_sendto+0x120/0x19c
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brcmfmac中无效地址访问，可能导致内核崩溃。
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 efc2c1fa8e145b60a7805fa9b6c92ac0746fccc3 ~ 7ccb0529446ae68a8581916bfc95c353306d76ba -
Linux Linux 4.13 -

II. Public POCs for CVE-2022-50678

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III. Intelligence Information for CVE-2022-50678

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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total

CVE-2025-40343 9.8 CRITICAL nvmet-fc: avoid scheduling association deletion twice
CVE-2023-53794 9.8 CRITICAL cifs: fix session state check in reconnect to avoid use-after-free issue
CVE-2022-50666 9.8 CRITICAL RDMA/siw: Fix QP destroy to wait for all references dropped.
CVE-2023-53827 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2023-53785 8.8 HIGH mt76: mt7921: don't assume adequate headroom for SDIO headers
CVE-2023-53822 8.8 HIGH wifi: ath11k: Ignore frags from uninitialized peer in dp.
CVE-2025-40336 8.8 HIGH drm/gpusvm: fix hmm_pfn_to_map_order() usage
CVE-2025-40342 8.8 HIGH nvme-fc: use lock accessing port_state and rport state
CVE-2025-40328 8.8 HIGH smb: client: fix potential UAF in smb2_close_cached_fid()
CVE-2023-53851 8.4 HIGH drm/msm/dp: Drop aux devices together with DP controller
CVE-2025-40337 8.2 HIGH net: stmmac: Correctly handle Rx checksum offload errors
CVE-2022-50656 8.1 HIGH nfc: pn533: Clear nfc_target before being used
CVE-2023-53803 8.1 HIGH scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
CVE-2023-53804 7.8 HIGH nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode()
CVE-2023-53819 7.8 HIGH amdgpu: validate offset_in_bo of drm_amdgpu_gem_va
CVE-2023-53816 7.8 HIGH drm/amdkfd: fix potential kgd_mem UAFs
CVE-2023-53800 7.8 HIGH ubi: Fix use-after-free when volume resizing failed
CVE-2023-53790 7.8 HIGH bpf: Zeroing allocated object from slab in bpf memory allocator
CVE-2023-53795 7.8 HIGH iommufd: IOMMUFD_DESTROY should not increase the refcount
CVE-2023-53810 7.8 HIGH blk-mq: release crypto keyslot before reporting I/O complete

Showing top 20 of 152 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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