{"id":"DEBIAN-CVE-2025-21729","details":"In the Linux kernel, the following vulnerability has been resolved:  wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion  The rtwdev-\u003escanning flag isn't protected by mutex originally, so cancel_hw_scan can pass the condition, but suddenly hw_scan completion unset the flag and calls ieee80211_scan_completed() that will free local-\u003ehw_scan_req. Then, cancel_hw_scan raises null-ptr-deref and use-after-free. Fix it by moving the check condition to where protected by mutex.   KASAN: null-ptr-deref in range [0x0000000000000088-0x000000000000008f]  CPU: 2 PID: 6922 Comm: kworker/2:2 Tainted: G           OE  Hardware name: LENOVO 2356AD1/2356AD1, BIOS G7ETB6WW (2.76 ) 09/10/2019  Workqueue: events cfg80211_conn_work [cfg80211]  RIP: 0010:rtw89_fw_h2c_scan_offload_be+0xc33/0x13c3 [rtw89_core]  Code: 00 45 89 6c 24 1c 0f 85 23 01 00 00 48 8b 85 20 ff ff ff 48 8d  RSP: 0018:ffff88811fd9f068 EFLAGS: 00010206  RAX: dffffc0000000000 RBX: ffff88811fd9f258 RCX: 0000000000000001  RDX: 0000000000000011 RSI: 0000000000000001 RDI: 0000000000000089  RBP: ffff88811fd9f170 R08: 0000000000000000 R09: 0000000000000000  R10: ffff88811fd9f108 R11: 0000000000000000 R12: ffff88810e47f960  R13: 0000000000000000 R14: 000000000000ffff R15: 0000000000000000  FS:  0000000000000000(0000) GS:ffff8881d6f00000(0000) knlGS:0000000000000000  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033  CR2: 00007531dfca55b0 CR3: 00000001be296004 CR4: 00000000001706e0  Call Trace:   \u003cTASK\u003e   ? show_regs+0x61/0x73   ? __die_body+0x20/0x73   ? die_addr+0x4f/0x7b   ? exc_general_protection+0x191/0x1db   ? asm_exc_general_protection+0x27/0x30   ? rtw89_fw_h2c_scan_offload_be+0xc33/0x13c3 [rtw89_core]   ? rtw89_fw_h2c_scan_offload_be+0x458/0x13c3 [rtw89_core]   ? __pfx_rtw89_fw_h2c_scan_offload_be+0x10/0x10 [rtw89_core]   ? do_raw_spin_lock+0x75/0xdb   ? __pfx_do_raw_spin_lock+0x10/0x10   rtw89_hw_scan_offload+0xb5e/0xbf7 [rtw89_core]   ? _raw_spin_unlock+0xe/0x24   ? __mutex_lock.constprop.0+0x40c/0x471   ? __pfx_rtw89_hw_scan_offload+0x10/0x10 [rtw89_core]   ? __mutex_lock_slowpath+0x13/0x1f   ? mutex_lock+0xa2/0xdc   ? __pfx_mutex_lock+0x10/0x10   rtw89_hw_scan_abort+0x58/0xb7 [rtw89_core]   rtw89_ops_cancel_hw_scan+0x120/0x13b [rtw89_core]   ieee80211_scan_cancel+0x468/0x4d0 [mac80211]   ieee80211_prep_connection+0x858/0x899 [mac80211]   ieee80211_mgd_auth+0xbea/0xdde [mac80211]   ? __pfx_ieee80211_mgd_auth+0x10/0x10 [mac80211]   ? cfg80211_find_elem+0x15/0x29 [cfg80211]   ? is_bss+0x1b7/0x1d7 [cfg80211]   ieee80211_auth+0x18/0x27 [mac80211]   cfg80211_mlme_auth+0x3bb/0x3e7 [cfg80211]   cfg80211_conn_do_work+0x410/0xb81 [cfg80211]   ? __pfx_cfg80211_conn_do_work+0x10/0x10 [cfg80211]   ? __kasan_check_read+0x11/0x1f   ? psi_group_change+0x8bc/0x944   ? __kasan_check_write+0x14/0x22   ? mutex_lock+0x8e/0xdc   ? __pfx_mutex_lock+0x10/0x10   ? __pfx___radix_tree_lookup+0x10/0x10   cfg80211_conn_work+0x245/0x34d [cfg80211]   ? __pfx_cfg80211_conn_work+0x10/0x10 [cfg80211]   ? update_cfs_rq_load_avg+0x3bc/0x3d7   ? sched_clock_noinstr+0x9/0x1a   ? sched_clock+0x10/0x24   ? sched_clock_cpu+0x7e/0x42e   ? newidle_balance+0x796/0x937   ? __pfx_sched_clock_cpu+0x10/0x10   ? __pfx_newidle_balance+0x10/0x10   ? __kasan_check_read+0x11/0x1f   ? psi_group_change+0x8bc/0x944   ? _raw_spin_unlock+0xe/0x24   ? raw_spin_rq_unlock+0x47/0x54   ? raw_spin_rq_unlock_irq+0x9/0x1f   ? finish_task_switch.isra.0+0x347/0x586   ? __schedule+0x27bf/0x2892   ? mutex_unlock+0x80/0xd0   ? do_raw_spin_lock+0x75/0xdb   ? __pfx___schedule+0x10/0x10   process_scheduled_works+0x58c/0x821   worker_thread+0x4c7/0x586   ? __kasan_check_read+0x11/0x1f   kthread+0x285/0x294   ? __pfx_worker_thread+0x10/0x10   ? __pfx_kthread+0x10/0x10   ret_from_fork+0x29/0x6f   ? __pfx_kthread+0x10/0x10   ret_from_fork_asm+0x1b/0x30   \u003c/TASK\u003e","modified":"2026-08-27T23:05:07.282525666Z","published":"2025-02-27T02:15:16.637Z","upstream":["CVE-2025-21729"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-21729"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.147-1","6.1.148-1","6.1.153-1","6.1.158-1","6.1.159-1","6.1.162-1","6.1.164-1","6.1.170-1","6.1.170-2","6.1.170-3","6.1.172-1","6.1.174-1","6.1.176-1","6.1.177-1","6.1.180-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1","6.10-1~exp1","6.10.1-1~exp1","6.10.11-1","6.10.11-1~bpo12+1","6.10.12-1","6.10.3-1","6.10.4-1","6.10.6-1","6.10.6-1~bpo12+1","6.10.7-1","6.10.9-1","6.11-1~exp1","6.11.10-1","6.11.10-1~bpo12+1","6.11.2-1","6.11.4-1","6.11.5-1","6.11.5-1~bpo12+1","6.11.6-1","6.11.7-1","6.11.9-1","6.11~rc4-1~exp1","6.11~rc5-1~exp1","6.12.10-1","6.12.100-1","6.12.101-1","6.12.105-1","6.12.11-1","6.12.11-1+alpha","6.12.11-1+alpha.1","6.12.12-1","6.12.12-1~bpo12+1","6.12.13-1","6.12.15-1","6.12.16-1","6.12.17-1","6.12.19-1","6.12.20-1","6.12.21-1","6.12.22-1","6.12.22-1~bpo12+1","6.12.25-1","6.12.27-1","6.12.27-1~bpo12+1","6.12.29-1","6.12.3-1","6.12.30-1","6.12.30-1~bpo12+1","6.12.31-1","6.12.32-1","6.12.32-1~bpo12+1","6.12.33-1","6.12.33-1~bpo12+1","6.12.35-1","6.12.35-1~bpo12+1","6.12.37-1","6.12.38-1","6.12.38-1~bpo12+1","6.12.41-1","6.12.43-1","6.12.43-1~bpo12+1","6.12.48-1","6.12.5-1","6.12.57-1","6.12.57-1~bpo12+1","6.12.6-1","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","6.12.8-1","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","6.12.9-1","6.12.9-1+alpha","6.12.9-1~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","6.12~rc6-1~exp1","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","6.16.10-1","6.16.11-1","6.16.12-1","6.16.12-1~bpo13+1","6.16.12-2","6.16.3-1","6.16.3-1~bpo13+1","6.16.5-1","6.16.6-1","6.16.7-1","6.16.8-1","6.16.9-1","6.16~rc7-1~exp1","6.17.10-1","6.17.11-1","6.17.12-1","6.17.13-1","6.17.13-1~bpo13+1","6.17.2-1~exp1","6.17.5-1~exp1","6.17.6-1","6.17.7-1","6.17.7-2","6.17.8-1","6.17.8-1~bpo13+1","6.17.9-1","6.18.1-1~exp1","6.18.10-1","6.18.12-1","6.18.12-1~bpo13+1","6.18.13-1","6.18.14-1","6.18.15-1","6.18.15-1~bpo13+1","6.18.2-1~exp1","6.18.3-1","6.18.5-1","6.18.5-1~bpo13+1","6.18.8-1","6.18.9-1","6.18.9-1~bpo13+1","6.18~rc4-1~exp1","6.18~rc4-1~exp2","6.18~rc5-1~exp1","6.18~rc6-1~exp1","6.18~rc7-1~exp1","6.19-1~exp1","6.19.10-1","6.19.10-1~bpo13+1","6.19.11-1","6.19.11-1~bpo13+1","6.19.12-1","6.19.13-1","6.19.13-1~bpo13+1","6.19.14-1","6.19.14-1~bpo13+1","6.19.2-1~exp1","6.19.3-1~exp1","6.19.4-1~exp1","6.19.5-1~exp1","6.19.6-1","6.19.6-2","6.19.6-2~bpo13+1","6.19.8-1","6.19.8-1~bpo13+1","6.19~rc4-1~exp1","6.19~rc5-1~exp1","6.19~rc6-1~exp1","6.19~rc7-1~exp1","6.19~rc8-1~exp1","6.3.1-1~exp1","6.3.11-1","6.3.2-1~exp1","6.3.4-1~exp1","6.3.5-1~exp1","6.3.7-1","6.3.7-1~bpo12+1","6.4.1-1~exp1","6.4.11-1","6.4.13-1","6.4.4-1","6.4.4-1~bpo12+1","6.4.4-2","6.4.4-3","6.4.4-3~bpo12+1","6.4~rc6-1~exp1","6.4~rc7-1~exp1","6.5.1-1~exp1","6.5.10-1","6.5.10-1~bpo12+1","6.5.13-1","6.5.3-1","6.5.3-1~bpo12+1","6.5.6-1","6.5.8-1","6.5~rc4-1~exp1","6.5~rc6-1~exp1","6.5~rc7-1~exp1","6.6.11-1","6.6.13-1","6.6.13-1~bpo12+1","6.6.15-1","6.6.15-2","6.6.3-1~exp1","6.6.4-1~exp1","6.6.7-1~exp1","6.6.8-1","6.6.9-1","6.7-1~exp1","6.7.1-1~exp1","6.7.12-1","6.7.12-1~bpo12+1","6.7.4-1~exp1","6.7.7-1","6.7.9-1","6.7.9-2","6.8.11-1","6.8.12-1","6.8.12-1~bpo12+1","6.8.9-1","6.9.10-1","6.9.10-1~bpo12+1","6.9.11-1","6.9.12-1","6.9.2-1~exp1","6.9.7-1","6.9.7-1~bpo12+1","6.9.8-1","6.9.9-1","7.0-1~exp1","7.0.1-1~exp1","7.0.10-1","7.0.10-1~bpo13+1","7.0.12-1","7.0.12-2","7.0.12-2~bpo13+1","7.0.13-1","7.0.13-1~bpo13+1","7.0.14-1","7.0.3-1","7.0.4-1","7.0.4-1~bpo13+1","7.0.7-1","7.0.7-1~bpo13+1","7.0.9-1","7.0.9-1~bpo13+1","7.1.1-1~exp1","7.1.10-1","7.1.2-1~ex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yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21729.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21729.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.13-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-21729.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:H/I:H/A:H"}]}