{"id":"CVE-2024-40912","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()\n\nThe ieee80211_sta_ps_deliver_wakeup() function takes sta->ps_lock to\nsynchronizes with ieee80211_tx_h…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()\n\nThe ieee80211_sta_ps_deliver_wakeup() function takes sta->ps_lock to\nsynchronizes with ieee80211_tx_h…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-667"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 3.14, < 4.19.317","linux_kernel >= 4.20, < 5.4.297","linux_kernel >= 5.5, < 5.10.221","linux_kernel >= 5.11, < 5.15.162","linux_kernel >= 5.16, < 6.1.95","linux_kernel >= 6.2, < 6.6.35","linux_kernel >= 6.7, < 6.9.6","linux_kernel = 6.10"],"patched":["linux_kernel 6.9.6"],"published":"2024-07-12","updated":"2026-10-15","sourceUpdated":"2026-10-15T01:18:37.013","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-40912","references":[{"url":"https://git.kernel.org/stable/c/28ba44d680a30c51cf485a2f5a3b680e66ed3932","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/44c06bbde6443de206b30f513100b5670b23fc5e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/456bbb8a31e425177dc0e8d4f98728a560c20e81","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/47d176755d5c0baf284eff039560f8c1ba0ea485","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9c49b58b9a2bed707e7638576e54c4bccd97b9eb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d90bdff79f8e40adf889b5408bfcf521528b169f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e51637e0c66a6f72d134d9f95daa47ea62b43c7e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7e916d693dcb5a297f40312600a82475f2e63bc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/28ba44d680a30c51cf485a2f5a3b680e66ed3932","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/44c06bbde6443de206b30f513100b5670b23fc5e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/456bbb8a31e425177dc0e8d4f98728a560c20e81","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/47d176755d5c0baf284eff039560f8c1ba0ea485","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/9c49b58b9a2bed707e7638576e54c4bccd97b9eb","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/d90bdff79f8e40adf889b5408bfcf521528b169f","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e51637e0c66a6f72d134d9f95daa47ea62b43c7e","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://git.kernel.org/stable/c/e7e916d693dcb5a297f40312600a82475f2e63bc","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-355557.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00225,"epssPercentile":0.12268,"ingestedAt":"2026-10-15T03:30:12.720Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T17:05:59.270343Z"},"slug":"CVE-2024-40912","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()\n\nThe ieee80211_sta_ps_deliver_wakeup() function takes sta->ps_lock to\nsynchronizes with ieee80211_tx_h_unicast_ps_buf() which is called from\nsoftirq context. However using only spin_lock() to get sta->ps_lock in\nieee80211_sta_ps_deliver_wakeup() does not prevent softirq to execute\non this same CPU, to run ieee80211_tx_h_unicast_ps_buf() and try to\ntake this same lock ending in deadlock. Below is an example of rcu stall\nthat arises in such situation.\n\n rcu: INFO: rcu_sched self-detected stall on CPU\n rcu:    2-....: (42413413 ticks this GP) idle=b154/1/0x4000000000000000 softirq=1763/1765 fqs=21206996\n rcu:    (t=42586894 jiffies g=2057 q=362405 ncpus=4)\n CPU: 2 PID: 719 Comm: wpa_supplicant Tainted: G        W          6.4.0-02158-g1b062f552873 #742\n Hardware name: RPT (r1) (DT)\n pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : queued_spin_lock_slowpath+0x58/0x2d0\n lr : invoke_tx_handlers_early+0x5b4/0x5c0\n sp : ffff00001ef64660\n x29: ffff00001ef64660 x28: ffff000009bc1070 x27: ffff000009bc0ad8\n x26: ffff000009bc0900 x25: ffff00001ef647a8 x24: 0000000000000000\n x23: ffff000009bc0900 x22: ffff000009bc0900 x21: ffff00000ac0e000\n x20: ffff00000a279e00 x19: ffff00001ef646e8 x18: 0000000000000000\n x17: ffff800016468000 x16: ffff00001ef608c0 x15: 0010533c93f64f80\n x14: 0010395c9faa3946 x13: 0000000000000000 x12: 00000000fa83b2da\n x11: 000000012edeceea x10: ffff0000010fbe00 x9 : 0000000000895440\n x8 : 000000000010533c x7 : ffff00000ad8b740 x6 : ffff00000c350880\n x5 : 0000000000000007 x4 : 0000000000000001 x3 : 0000000000000000\n x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffff00000ac0e0e8\n Call trace:\n  queued_spin_lock_slowpath+0x58/0x2d0\n  ieee80211_tx+0x80/0x12c\n  ieee80211_tx_pending+0x110/0x278\n  tasklet_action_common.constprop.0+0x10c/0x144\n  tasklet_action+0x20/0x28\n  _stext+0x11c/0x284\n  ____do_softirq+0xc/0x14\n  call_on_irq_stack+0x24/0x34\n  do_softirq_own_stack+0x18/0x20\n  do_softirq+0x74/0x7c\n  __local_bh_enable_ip+0xa0/0xa4\n  _ieee80211_wake_txqs+0x3b0/0x4b8\n  __ieee80211_wake_queue+0x12c/0x168\n  ieee80211_add_pending_skbs+0xec/0x138\n  ieee80211_sta_ps_deliver_wakeup+0x2a4/0x480\n  ieee80211_mps_sta_status_update.part.0+0xd8/0x11c\n  ieee80211_mps_sta_status_update+0x18/0x24\n  sta_apply_parameters+0x3bc/0x4c0\n  ieee80211_change_station+0x1b8/0x2dc\n  nl80211_set_station+0x444/0x49c\n  genl_family_rcv_msg_doit.isra.0+0xa4/0xfc\n  genl_rcv_msg+0x1b0/0x244\n  netlink_rcv_skb+0x38/0x10c\n  genl_rcv+0x34/0x48\n  netlink_unicast+0x254/0x2bc\n  netlink_sendmsg+0x190/0x3b4\n  ____sys_sendmsg+0x1e8/0x218\n  ___sys_sendmsg+0x68/0x8c\n  __sys_sendmsg+0x44/0x84\n  __arm64_sys_sendmsg+0x20/0x28\n  do_el0_svc+0x6c/0xe8\n  el0_svc+0x14/0x48\n  el0t_64_sync_handler+0xb0/0xb4\n  el0t_64_sync+0x14c/0x150\n\nUsing spin_lock_bh()/spin_unlock_bh() instead prevents softirq to raise\non the same CPU that is holding the lock.\n\n## Affected\n\n- `linux_kernel >= 3.14, < 4.19.317`\n- `linux_kernel >= 4.20, < 5.4.297`\n- `linux_kernel >= 5.5, < 5.10.221`\n- `linux_kernel >= 5.11, < 5.15.162`\n- `linux_kernel >= 5.16, < 6.1.95`\n- `linux_kernel >= 6.2, < 6.6.35`\n- `linux_kernel >= 6.7, < 6.9.6`\n- `linux_kernel = 6.10`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.9.6`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}