{"id":"DEBIAN-CVE-2025-38646","details":"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() -\u003e 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 \u003c41\u003e 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:   \u003cIRQ\u003e   ? __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)]","modified":"2026-08-27T23:05:22.370609071Z","published":"2025-08-22T16:15:38.870Z","upstream":["CVE-2025-38646"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-38646"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.43-1"}]}],"versions":["6.12.38-1","6.12.41-1","6.12.43-1~bpo12+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38646.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16.3-1"}]}],"versions":["6.12.100-1","6.12.101-1","6.12.105-1","6.12.38-1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.63-1","6.12.63-1~bpo12+1","6.12.69-1","6.12.69-1~bpo12+1","6.12.73-1","6.12.73-1~bpo12+1","6.12.74-1","6.12.74-2","6.12.74-2~bpo12+1","6.12.85-1","6.12.85-1~bpo12+1","6.12.86-1","6.12.86-1~bpo12+1","6.12.88-1","6.12.88-1~bpo12+1","6.12.90-1","6.12.90-1~bpo12+1","6.12.90-2","6.12.90-2~bpo12+1","6.12.94-1","6.12.94-1~bpo12+1","6.12.95-1","6.12.95-1~bpo12+1","6.12.96-1","6.13.10-1~exp1","6.13.11-1~exp1","6.13.2-1~exp1","6.13.3-1~exp1","6.13.4-1~exp1","6.13.5-1~exp1","6.13.6-1~exp1","6.13.7-1~exp1","6.13.8-1~exp1","6.13.9-1~exp1","6.13~rc6-1~exp1","6.13~rc7-1~exp1","6.14.3-1~exp1","6.14.5-1~exp1","6.14.6-1~exp1","6.15-1~exp1","6.15.1-1~exp1","6.15.2-1~exp1","6.15.3-1~exp1","6.15.4-1~exp1","6.15.5-1~exp1","6.15.6-1~exp1","6.15~rc7-1~exp1","6.16-1~exp1","6.16.1-1~exp1","6.16.3-1~bpo13+1","6.16~rc7-1~exp1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38646.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}