CVE-2025-38509— wifi: mac80211: reject VHT opmode for unsupported channel widths
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I. Basic Information for CVE-2025-38509
Vulnerability Information
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Vulnerability Title
wifi: mac80211: reject VHT opmode for unsupported channel widths
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: reject VHT opmode for unsupported channel widths VHT operating mode notifications are not defined for channel widths below 20 MHz. In particular, 5 MHz and 10 MHz are not valid under the VHT specification and must be rejected. Without this check, malformed notifications using these widths may reach ieee80211_chan_width_to_rx_bw(), leading to a WARN_ON due to invalid input. This issue was reported by syzbot. Reject these unsupported widths early in sta_link_apply_parameters() when opmode_notif is used. The accepted set includes 20, 40, 80, 160, and 80+80 MHz, which are valid for VHT. While 320 MHz is not defined for VHT, it is allowed to avoid rejecting HE or EHT clients that may still send a VHT opmode notification.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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，该漏洞源于未拒绝不支持信道宽度的VHT操作模式，可能导致内核警告。
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-2025-38509
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Same Patch Batch · Linux · 2025-08-16 · 59 CVEs total
| CVE-2025-38520 | drm/amdkfd: Don't call mmput from MMU notifier callback | |
| CVE-2025-38507 | HID: nintendo: avoid bluetooth suspend/resume stalls | |
| CVE-2025-38504 | io_uring/zcrx: fix pp destruction warnings | |
| CVE-2025-38505 | wifi: mwifiex: discard erroneous disassoc frames on STA interface | |
| CVE-2025-38506 | KVM: Allow CPU to reschedule while setting per-page memory attributes | |
| CVE-2025-38503 | btrfs: fix assertion when building free space tree | |
| CVE-2025-38516 | pinctrl: qcom: msm: mark certain pins as invalid for interrupts | |
| CVE-2025-38517 | lib/alloc_tag: do not acquire non-existent lock in alloc_tag_top_users() | |
| CVE-2025-38518 | x86/CPU/AMD: Disable INVLPGB on Zen2 | |
| CVE-2025-38519 | mm/damon: fix divide by zero in damon_get_intervals_score() | |
| CVE-2025-38515 | drm/sched: Increment job count before swapping tail spsc queue | |
| CVE-2025-38521 | drm/imagination: Fix kernel crash when hard resetting the GPU | |
| CVE-2025-38522 | sched/ext: Prevent update_locked_rq() calls with NULL rq | |
| CVE-2025-38523 | cifs: Fix the smbd_response slab to allow usercopy | |
| CVE-2025-38524 | rxrpc: Fix recv-recv race of completed call | |
| CVE-2025-38525 | rxrpc: Fix irq-disabled in local_bh_enable() | |
| CVE-2025-38526 | ice: add NULL check in eswitch lag check | |
| CVE-2025-38527 | smb: client: fix use-after-free in cifs_oplock_break | |
| CVE-2025-38528 | bpf: Reject %p% format string in bprintf-like helpers | |
| CVE-2025-38529 | comedi: aio_iiro_16: Fix bit shift out of bounds |
Showing top 20 of 59 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
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unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-38509
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