{"cve":"CVE-2025-38646","nvd":{"published":"2025-08-22T16:15:38.870","modified":"2026-06-17T09:17:17.753","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band\n\nWith a quite rare chance, RX report might be problematic to make SW think\na packet is received on 6 GHz band even if the chip does not support 6 GHz\nband actually. Since SW won't initialize stuffs for unsupported bands, NULL\ndereference will happen then in the sequence, rtw89_vif_rx_stats_iter() ->\nrtw89_core_cancel_6ghz_probe_tx(). So, add a check to avoid it.\n\nThe following is a crash log for this case.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000032\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 1907 Comm: irq/131-rtw89_p Tainted: G     U             6.6.56-05896-g89f5fb0eb30b #1 (HASH:1400 4)\n Hardware name: Google Telith/Telith, BIOS Google_Telith.15217.747.0 11/12/2024\n RIP: 0010:rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core]\n Code: 4c 89 7d c8 48 89 55 c0 49 8d 44 24 02 48 89 45 b8 45 31 ff eb 11\n 41 c6 45 3a 01 41 b7 01 4d 8b 6d 00 4d 39 f5 74 42 8b 43 10 <41> 33 45\n 32 0f b7 4b 14 66 41 33 4d 36 0f b7 c9 09 c1 74 d8 4d 85\n RSP: 0018:ffff9f3080138ca0 EFLAGS: 00010246\n RAX: 00000000b8bf5770 RBX: ffff91b5e8c639c0 RCX: 0000000000000011\n RDX: ffff91b582de1be8 RSI: 0000000000000000 RDI: ffff91b5e8c639e6\n RBP: ffff9f3080138d00 R08: 0000000000000000 R09: 0000000000000000\n R10: ffff91b59de70000 R11: ffffffffc069be50 R12: ffff91b5e8c639e4\n R13: 0000000000000000 R14: ffff91b5828020b8 R15: 0000000000000000\n FS:  0000000000000000(0000) GS:ffff91b8efa40000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000032 CR3: 00000002bf838000 CR4: 0000000000750ee0\n PKRU: 55555554\n Call Trace:\n  <IRQ>\n  ? __die_body+0x68/0xb0\n  ? page_fault_oops+0x379/0x3e0\n  ? exc_page_fault+0x4f/0xa0\n  ? asm_exc_page_fault+0x22/0x30\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\n  ? rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core (HASH:1400 5)]\n  __iterate_interfaces+0x59/0x110 [mac80211 (HASH:1400 6)]\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\n  ieee80211_iterate_active_interfaces_atomic+0x36/0x50 [mac80211 (HASH:1400 6)]\n  rtw89_core_rx_to_mac80211+0xfd/0x1b0 [rtw89_core (HASH:1400 5)]\n  rtw89_core_rx+0x43a/0x980 [rtw89_core (HASH:1400 5)]","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/4b525630729082f026e7030eafccf89e3add7eae","https://git.kernel.org/stable/c/77a7a48f87d673a68664bebf044214821decbfda","https://git.kernel.org/stable/c/7e04f01bb94fe61c73cc59f0495c3b6c16a83231","https://git.kernel.org/stable/c/892b29eab44b1803d2cad8e50f1bc2144ef478cb","https://git.kernel.org/stable/c/f3527ac15a00916e68ecb495b74dbe6a6c62a06f"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:07:46.309729541+00:00"},"epss":{"cve":"CVE-2025-38646","score":0.00165,"percentile":0.05779,"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."]}