{"cve":"CVE-2025-38606","nvd":{"published":"2025-08-19T17:15:38.930","modified":"2026-06-17T09:17:12.260","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath12k: Avoid accessing uninitialized arvif->ar during beacon miss\n\nDuring beacon miss handling, ath12k driver iterates over active virtual\ninterfaces (vifs) and attempts to access the radio object (ar) via\narvif->deflink->ar.\n\nHowever, after commit aa80f12f3bed (\"wifi: ath12k: defer vdev creation for\nMLO\"), arvif is linked to a radio only after vdev creation, typically when\na channel is assigned or a scan is requested.\nFor P2P capable devices, a default P2P interface is created by\nwpa_supplicant along with regular station interfaces, these serve as dummy\ninterfaces for P2P-capable stations, lack an associated netdev and initiate\nfrequent scans to discover neighbor p2p devices. When a scan is initiated\non such P2P vifs, driver selects destination radio (ar) based on scan\nfrequency, creates a scan vdev, and attaches arvif to the radio. Once the\nscan completes or is aborted, the scan vdev is deleted, detaching arvif\nfrom the radio and leaving arvif->ar uninitialized.\n\nWhile handling beacon miss for station interfaces, P2P interface is also\nencountered in the vif iteration and ath12k_mac_handle_beacon_miss_iter()\ntries to dereference the uninitialized arvif->deflink->ar.\n\nFix this by verifying that vdev is created for the arvif before accessing\nits ar during beacon miss handling and similar vif iterator callbacks.\n\n==========================================================================\n wlp6s0: detected beacon loss from AP (missed 7 beacons) - probing\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n\n CPU: 5 UID: 0 PID: 0 Comm: swapper/5 Not tainted 6.16.0-rc1-wt-ath+ #2 PREEMPT(full)\n RIP: 0010:ath12k_mac_handle_beacon_miss_iter+0xb5/0x1a0 [ath12k]\n Call Trace:\n  __iterate_interfaces+0x11a/0x410 [mac80211]\n  ieee80211_iterate_active_interfaces_atomic+0x61/0x140 [mac80211]\n  ath12k_mac_handle_beacon_miss+0xa1/0xf0 [ath12k]\n  ath12k_roam_event+0x393/0x560 [ath12k]\n  ath12k_wmi_op_rx+0x1486/0x28c0 [ath12k]\n  ath12k_htc_process_trailer.isra.0+0x2fb/0x620 [ath12k]\n  ath12k_htc_rx_completion_handler+0x448/0x830 [ath12k]\n  ath12k_ce_recv_process_cb+0x549/0x9e0 [ath12k]\n  ath12k_ce_per_engine_service+0xbe/0xf0 [ath12k]\n  ath12k_pci_ce_workqueue+0x69/0x120 [ath12k]\n  process_one_work+0xe3a/0x1430\n\nTested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1\nTested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/1259b6da8303f70fef6ed4aef8ae3dedfecb0f27","https://git.kernel.org/stable/c/36670b67de18f1e5d34900c5d2ac60a8970c293c","https://git.kernel.org/stable/c/9b861dfc5c07defd0191fd3e7288a3179cd9a02e"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:07:46.309729541+00:00"},"epss":{"cve":"CVE-2025-38606","score":0.00159,"percentile":0.05056,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}