CVE-2025-38646— wifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band
Affected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0< 892b29eab44b1803d2cad8e50f1bc2144ef478cb | affected |
c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0< 77a7a48f87d673a68664bebf044214821decbfda | affected | ||
c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0< f3527ac15a00916e68ecb495b74dbe6a6c62a06f | affected | ||
c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0< 4b525630729082f026e7030eafccf89e3add7eae | affected | ||
c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0< 7e04f01bb94fe61c73cc59f0495c3b6c16a83231 | affected | ||
6.4 | affected | ||
< 6.4 | unaffected | ||
6.6.102≤ 6.6.* | unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2025-38646
Vulnerability Information
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Vulnerability Title
wifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band With a quite rare chance, RX report might be problematic to make SW think a packet is received on 6 GHz band even if the chip does not support 6 GHz band actually. Since SW won't initialize stuffs for unsupported bands, NULL dereference will happen then in the sequence, rtw89_vif_rx_stats_iter() -> rtw89_core_cancel_6ghz_probe_tx(). So, add a check to avoid it. The following is a crash log for this case. BUG: kernel NULL pointer dereference, address: 0000000000000032 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 1907 Comm: irq/131-rtw89_p Tainted: G U 6.6.56-05896-g89f5fb0eb30b #1 (HASH:1400 4) Hardware name: Google Telith/Telith, BIOS Google_Telith.15217.747.0 11/12/2024 RIP: 0010:rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core] Code: 4c 89 7d c8 48 89 55 c0 49 8d 44 24 02 48 89 45 b8 45 31 ff eb 11 41 c6 45 3a 01 41 b7 01 4d 8b 6d 00 4d 39 f5 74 42 8b 43 10 <41> 33 45 32 0f b7 4b 14 66 41 33 4d 36 0f b7 c9 09 c1 74 d8 4d 85 RSP: 0018:ffff9f3080138ca0 EFLAGS: 00010246 RAX: 00000000b8bf5770 RBX: ffff91b5e8c639c0 RCX: 0000000000000011 RDX: ffff91b582de1be8 RSI: 0000000000000000 RDI: ffff91b5e8c639e6 RBP: ffff9f3080138d00 R08: 0000000000000000 R09: 0000000000000000 R10: ffff91b59de70000 R11: ffffffffc069be50 R12: ffff91b5e8c639e4 R13: 0000000000000000 R14: ffff91b5828020b8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff91b8efa40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000032 CR3: 00000002bf838000 CR4: 0000000000750ee0 PKRU: 55555554 Call Trace: <IRQ> ? __die_body+0x68/0xb0 ? page_fault_oops+0x379/0x3e0 ? exc_page_fault+0x4f/0xa0 ? asm_exc_page_fault+0x22/0x30 ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)] ? rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core (HASH:1400 5)] __iterate_interfaces+0x59/0x110 [mac80211 (HASH:1400 6)] ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)] ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)] ieee80211_iterate_active_interfaces_atomic+0x36/0x50 [mac80211 (HASH:1400 6)] rtw89_core_rx_to_mac80211+0xfd/0x1b0 [rtw89_core (HASH:1400 5)] rtw89_core_rx+0x43a/0x980 [rtw89_core (HASH:1400 5)]
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rtw89在不受支持的6 GHz频段接收问题数据包时可能导致空指针取消引用。
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-2025-38646
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|---|
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Same Patch Batch · Linux · 2025-08-22 · 60 CVEs total
| CVE-2025-38634 | power: supply: cpcap-charger: Fix null check for power_supply_get_by_name | |
| CVE-2025-38616 | tls: handle data disappearing from under the TLS ULP | |
| CVE-2025-38620 | zloop: fix KASAN use-after-free of tag set | |
| CVE-2025-38619 | media: ti: j721e-csi2rx: fix list_del corruption | |
| CVE-2025-38621 | md: make rdev_addable usable for rcu mode | |
| CVE-2025-38618 | vsock: Do not allow binding to VMADDR_PORT_ANY | |
| CVE-2025-38630 | fbdev: imxfb: Check fb_add_videomode to prevent null-ptr-deref | |
| CVE-2025-38632 | pinmux: fix race causing mux_owner NULL with active mux_usecount | |
| CVE-2025-38631 | clk: imx95-blk-ctl: Fix synchronous abort | |
| CVE-2025-38633 | clk: spacemit: mark K1 pll1_d8 as critical | |
| CVE-2025-38629 | ALSA: usb: scarlett2: Fix missing NULL check | |
| CVE-2025-38635 | clk: davinci: Add NULL check in davinci_lpsc_clk_register() | |
| CVE-2025-38636 | rv: Use strings in da monitors tracepoints | |
| CVE-2025-38638 | ipv6: add a retry logic in net6_rt_notify() | |
| CVE-2025-38639 | netfilter: xt_nfacct: don't assume acct name is null-terminated | |
| CVE-2025-38640 | bpf: Disable migration in nf_hook_run_bpf(). | |
| CVE-2025-38641 | Bluetooth: btusb: Fix potential NULL dereference on kmalloc failure | |
| CVE-2025-38642 | wifi: mac80211: fix WARN_ON for monitor mode on some devices | |
| CVE-2025-38643 | wifi: cfg80211: Add missing lock in cfg80211_check_and_end_cac() | |
| CVE-2025-38644 | wifi: mac80211: reject TDLS operations when station is not associated |
Showing top 20 of 60 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
Same vendor: Linux
- CVE-2026-43502
net/rds: handle zerocopy send cleanup before the message is - CVE-2026-43501
ipv6: rpl: reserve mac_len headroom when recompressed SRH gr - CVE-2026-43498
accel/ivpu: Disallow re-exporting imported GEM objects - CVE-2026-43499
rtmutex: Use waiter::task instead of current in remove_waite - CVE-2026-43497
fbdev: udlfb: add vm_ops to dlfb_ops_mmap to prevent use-aft
V. Comments for CVE-2025-38646
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