{"api_version":"1","generated_at":"2026-07-23T11:40:20+00:00","cve":"CVE-2024-40912","urls":{"html":"https://cve.report/CVE-2024-40912","api":"https://cve.report/api/cve/CVE-2024-40912.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2024-40912","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-40912"},"summary":{"title":"wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()","description":"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_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.","state":"PUBLISHED","assigner":"Linux","published_at":"2024-07-12 13:15:14","updated_at":"2026-05-12 12:16:59"},"problem_types":["CWE-667"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/9c49b58b9a2bed707e7638576e54c4bccd97b9eb","name":"https://git.kernel.org/stable/c/9c49b58b9a2bed707e7638576e54c4bccd97b9eb","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/44c06bbde6443de206b30f513100b5670b23fc5e","name":"https://git.kernel.org/stable/c/44c06bbde6443de206b30f513100b5670b23fc5e","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-265688.html","refsource":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d90bdff79f8e40adf889b5408bfcf521528b169f","name":"https://git.kernel.org/stable/c/d90bdff79f8e40adf889b5408bfcf521528b169f","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-355557.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-355557.html","refsource":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/47d176755d5c0baf284eff039560f8c1ba0ea485","name":"https://git.kernel.org/stable/c/47d176755d5c0baf284eff039560f8c1ba0ea485","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","name":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/28ba44d680a30c51cf485a2f5a3b680e66ed3932","name":"https://git.kernel.org/stable/c/28ba44d680a30c51cf485a2f5a3b680e66ed3932","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/456bbb8a31e425177dc0e8d4f98728a560c20e81","name":"https://git.kernel.org/stable/c/456bbb8a31e425177dc0e8d4f98728a560c20e81","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e51637e0c66a6f72d134d9f95daa47ea62b43c7e","name":"https://git.kernel.org/stable/c/e51637e0c66a6f72d134d9f95daa47ea62b43c7e","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7e916d693dcb5a297f40312600a82475f2e63bc","name":"https://git.kernel.org/stable/c/e7e916d693dcb5a297f40312600a82475f2e63bc","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-40912","name":"CVE 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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."}],"providerMetadata":{"dateUpdated":"2026-05-11T20:22:13.868Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e51637e0c66a6f72d134d9f95daa47ea62b43c7e"},{"url":"https://git.kernel.org/stable/c/28ba44d680a30c51cf485a2f5a3b680e66ed3932"},{"url":"https://git.kernel.org/stable/c/e7e916d693dcb5a297f40312600a82475f2e63bc"},{"url":"https://git.kernel.org/stable/c/d90bdff79f8e40adf889b5408bfcf521528b169f"},{"url":"https://git.kernel.org/stable/c/9c49b58b9a2bed707e7638576e54c4bccd97b9eb"},{"url":"https://git.kernel.org/stable/c/456bbb8a31e425177dc0e8d4f98728a560c20e81"},{"url":"https://git.kernel.org/stable/c/47d176755d5c0baf284eff039560f8c1ba0ea485"},{"url":"https://git.kernel.org/stable/c/44c06bbde6443de206b30f513100b5670b23fc5e"}],"title":"wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2024-40912","datePublished":"2024-07-12T12:20:50.488Z","dateReserved":"2024-07-12T12:17:45.581Z","dateUpdated":"2026-05-12T11:55:40.339Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2024-07-12 13:15:14","lastModifiedDate":"2026-05-12 12:16:59","problem_types":["CWE-667"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.14","versionEndExcluding":"4.19.317","matchCriteriaId":"94AD7CE0-1AB3-4F0C-9642-209112A5ECB7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.297","matchCriteriaId":"212DEE06-A450-420F-8BAA-20996395BBF4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.221","matchCriteriaId":"659E1520-6345-41AF-B893-A7C0647585A0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.162","matchCriteriaId":"10A39ACC-3005-40E8-875C-98A372D1FFD5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.95","matchCriteriaId":"D435765D-2766-44F5-B319-F713A13E35CE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.35","matchCriteriaId":"6F019D15-84C0-416B-8C57-7F51B68992F0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.9.6","matchCriteriaId":"0ABBBA1D-F79D-4BDB-AA41-D1EDCC4A6975"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*","matchCriteriaId":"2EBB4392-5FA6-4DA9-9772-8F9C750109FA"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*","matchCriteriaId":"331C2F14-12C7-45D5-893D-8C52EE38EA10"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2024","CveId":"40912","Ordinal":"1","Title":"wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup(","CVE":"CVE-2024-40912","Year":"2024"},"notes":[{"CveYear":"2024","CveId":"40912","Ordinal":"1","NoteData":"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_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.","Type":"Description","Title":"wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup("}]}}}