CVE-2025-38606— wifi: ath12k: Avoid accessing uninitialized arvif->ar during beacon miss
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wifi: ath12k模块在beacon丢失时访问未初始化的arvif->ar。
Possible ATT&CK Techniques 2 AI
T1203 · Exploitation for Client Execution T1059 · Command and Scripting InterpreterAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | aa80f12f3bedc2d73e4cc43554aee44c277cc938< 9b861dfc5c07defd0191fd3e7288a3179cd9a02e |
affected |
aa80f12f3bedc2d73e4cc43554aee44c277cc938< 1259b6da8303f70fef6ed4aef8ae3dedfecb0f27 |
affected | ||
aa80f12f3bedc2d73e4cc43554aee44c277cc938< 36670b67de18f1e5d34900c5d2ac60a8970c293c |
affected | ||
6.14 |
affected | ||
< 6.14 |
unaffected | ||
6.15.10≤ 6.15.* |
unaffected | ||
6.16.1≤ 6.16.* |
unaffected | ||
6.17≤ * |
unaffected |
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I. Basic Information for CVE-2025-38606
Vulnerability Information
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Vulnerability Title
wifi: ath12k: Avoid accessing uninitialized arvif->ar during beacon miss
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath12k: Avoid accessing uninitialized arvif->ar during beacon miss
During beacon miss handling, ath12k driver iterates over active virtual
interfaces (vifs) and attempts to access the radio object (ar) via
arvif->deflink->ar.
However, after commit aa80f12f3bed ("wifi: ath12k: defer vdev creation for
MLO"), arvif is linked to a radio only after vdev creation, typically when
a channel is assigned or a scan is requested.
For P2P capable devices, a default P2P interface is created by
wpa_supplicant along with regular station interfaces, these serve as dummy
interfaces for P2P-capable stations, lack an associated netdev and initiate
frequent scans to discover neighbor p2p devices. When a scan is initiated
on such P2P vifs, driver selects destination radio (ar) based on scan
frequency, creates a scan vdev, and attaches arvif to the radio. Once the
scan completes or is aborted, the scan vdev is deleted, detaching arvif
from the radio and leaving arvif->ar uninitialized.
While handling beacon miss for station interfaces, P2P interface is also
encountered in the vif iteration and ath12k_mac_handle_beacon_miss_iter()
tries to dereference the uninitialized arvif->deflink->ar.
Fix this by verifying that vdev is created for the arvif before accessing
its ar during beacon miss handling and similar vif iterator callbacks.
==========================================================================
wlp6s0: detected beacon loss from AP (missed 7 beacons) - probing
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 5 UID: 0 PID: 0 Comm: swapper/5 Not tainted 6.16.0-rc1-wt-ath+ #2 PREEMPT(full)
RIP: 0010:ath12k_mac_handle_beacon_miss_iter+0xb5/0x1a0 [ath12k]
Call Trace:
__iterate_interfaces+0x11a/0x410 [mac80211]
ieee80211_iterate_active_interfaces_atomic+0x61/0x140 [mac80211]
ath12k_mac_handle_beacon_miss+0xa1/0xf0 [ath12k]
ath12k_roam_event+0x393/0x560 [ath12k]
ath12k_wmi_op_rx+0x1486/0x28c0 [ath12k]
ath12k_htc_process_trailer.isra.0+0x2fb/0x620 [ath12k]
ath12k_htc_rx_completion_handler+0x448/0x830 [ath12k]
ath12k_ce_recv_process_cb+0x549/0x9e0 [ath12k]
ath12k_ce_per_engine_service+0xbe/0xf0 [ath12k]
ath12k_pci_ce_workqueue+0x69/0x120 [ath12k]
process_one_work+0xe3a/0x1430
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1
Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
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wifi: ath12k模块在beacon丢失时访问未初始化的arvif->ar。
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-2025-38606
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2025-08-19 · 59 CVEs total
| CVE-2025-38561 | 9.8 CRITICAL | ksmbd: fix Preauh_HashValue race condition |
| CVE-2025-38566 | 9.8 CRITICAL | sunrpc: fix handling of server side tls alerts |
| CVE-2025-38560 | 9.3 CRITICAL | x86/sev: Evict cache lines during SNP memory validation |
| CVE-2025-38601 | 8.8 HIGH | wifi: ath11k: clear initialized flag for deinit-ed srng lists |
| CVE-2025-38600 | 8.8 HIGH | wifi: mt76: mt7925: fix off by one in mt7925_mcu_hw_scan() |
| CVE-2025-38599 | 8.8 HIGH | wifi: mt76: mt7996: Fix possible OOB access in mt7996_tx() |
| CVE-2025-38592 | 8.8 HIGH | Bluetooth: hci_devcd_dump: fix out-of-bounds via dev_coredumpv |
| CVE-2025-38608 | 8.6 HIGH | bpf, ktls: Fix data corruption when using bpf_msg_pop_data() in ktls |
| CVE-2025-38574 | 8.6 HIGH | pptp: ensure minimal skb length in pptp_xmit() |
| CVE-2025-38571 | 8.2 HIGH | sunrpc: fix client side handling of tls alerts |
| CVE-2025-38615 | 7.8 HIGH | fs/ntfs3: cancle set bad inode after removing name fails |
| CVE-2025-38579 | 7.8 HIGH | f2fs: fix KMSAN uninit-value in extent_info usage |
| CVE-2025-38604 | 7.8 HIGH | wifi: rtl818x: Kill URBs before clearing tx status queue |
| CVE-2025-38607 | 7.8 HIGH | bpf: handle jset (if a & b ...) as a jump in CFG computation |
| CVE-2025-38614 | 7.8 HIGH | eventpoll: Fix semi-unbounded recursion |
| CVE-2025-38593 | 7.8 HIGH | Bluetooth: hci_sync: fix double free in 'hci_discovery_filter_clear()' |
| CVE-2025-38586 | 7.8 HIGH | bpf, arm64: Fix fp initialization for exception boundary |
| CVE-2025-38582 | 7.8 HIGH | RDMA/hns: Fix double destruction of rsv_qp |
| CVE-2025-38580 | 7.8 HIGH | ext4: fix inode use after free in ext4_end_io_rsv_work() |
| CVE-2025-38555 | 7.8 HIGH | usb: gadget : fix use-after-free in composite_dev_cleanup() |
Showing top 20 of 59 CVEs. View all on vendor page → →
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V. Comments for CVE-2025-38606
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