CVE-2025-37918

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This is because it incorrectly\nforwards the return value of hci_devcd_init() (which returns 0 on\nsuccess). As a result, the caller (btusb_recv_acl_qca() or\nbtusb_recv_evt_qca()) assumes the packet was not handled and passes it\nto hci_recv_frame(), leading to premature kfree() of the skb.\n\nLater, hci_devcd_rx() attempts to dequeue the same skb from the dump\nqueue, resulting in a NULL pointer dereference.\n\nFix this by:\n1. Making handle_dump_pkt_qca() return 0 on success and negative errno\n on failure, consistent with kernel conventions.\n2. Splitting dump packet detection into separate functions for ACL\n and event packets for better structure and readability.\n\nThis ensures dump packets are properly identified and consumed, avoiding\ndouble handling and preventing NULL pointer access."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The vulnerable code processes data emitted by the QCA Bluetooth controller, and the crash-dump sequence that triggers it is produced when the controller firmware crashes \u2014 something an attacker within Bluetooth radio range can induce with malformed link-layer/LMP frames without pairing. Per kernel guidance, Bluetooth-reachable bugs are Adjacent.\nAC:L - Once the controller enters crash-dump mode, the defect fires deterministically on the very first (seqno==0) dump packet \u2014 there is no race to win and no memory layout the attacker cannot influence. The reporter hit it in ordinary operation on a WCN7851.\nPR:N - The path from URB completion (btusb_recv_bulk \u2192 btusb_recv_acl \u2192 btusb_recv_acl_qca) contains no capability check, no HCI authentication, and no pairing requirement. A radio-range attacker needs no account or credentials on the victim system.\nUI:N - Dump-packet handling is entirely automatic in the driver's receive path and the workqueue; no victim action is required.\nS:U - The corruption is confined to kernel heap objects and queues managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The same skb sits on two queues and is freed while still referenced, so hci_devcd_handle_pkt_skb() copies freed (potentially reallocated) heap memory into the dump buffer that dev_coredumpv() exports to userspace, and the UAF generally yields a read primitive over reallocated kernel objects.\nI:H - Double-linked-list corruption of dump_q/rx_q plus a double-free of the skb; heap-spraying the freed skb gives attacker-controlled next/prev pointers that skb_dequeue() unlinks, a classic arbitrary-write primitive.\nA:H - The documented result is an immediate kernel NULL pointer dereference oops in skb_dequeue() from the hci0 workqueue, plus double-free of the skb \u2014 a reliable kernel crash."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/bluetooth/btusb.c"], "versions": [{"version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "2e8d44ebaa7babdd5c5ab50ca275826e241920d6", "status": "affected", "versionType": "git"}, {"version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "b70b41591ec48c78ec6a885e1f57bfc4029e5e13", "status": "affected", "versionType": "git"}, {"version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "8563d9fabd8a4b726ba7acab4737c438bf11a059", "status": "affected", "versionType": "git"}, {"version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "0317b033abcd1d8dd2798f0e2de5e84543d0bd22", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/bluetooth/btusb.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.90", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.28", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14.6", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6.90"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.28"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.14.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2e8d44ebaa7babdd5c5ab50ca275826e241920d6"}, {"url": "https://git.kernel.org/stable/c/b70b41591ec48c78ec6a885e1f57bfc4029e5e13"}, {"url": "https://git.kernel.org/stable/c/8563d9fabd8a4b726ba7acab4737c438bf11a059"}, {"url": "https://git.kernel.org/stable/c/0317b033abcd1d8dd2798f0e2de5e84543d0bd22"}], "title": "Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-37918", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:46:03.552786Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:52:03.622Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-37918", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:46:03.552786Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:46:04.355Z"}}], "cna": {"title": "Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:A - The vulnerable code processes data emitted by the QCA Bluetooth controller, and the crash-dump sequence that triggers it is produced when the controller firmware crashes \u2014 something an attacker within Bluetooth radio range can induce with malformed link-layer/LMP frames without pairing. Per kernel guidance, Bluetooth-reachable bugs are Adjacent.\nAC:L - Once the controller enters crash-dump mode, the defect fires deterministically on the very first (seqno==0) dump packet \u2014 there is no race to win and no memory layout the attacker cannot influence. The reporter hit it in ordinary operation on a WCN7851.\nPR:N - The path from URB completion (btusb_recv_bulk \u2192 btusb_recv_acl \u2192 btusb_recv_acl_qca) contains no capability check, no HCI authentication, and no pairing requirement. A radio-range attacker needs no account or credentials on the victim system.\nUI:N - Dump-packet handling is entirely automatic in the driver's receive path and the workqueue; no victim action is required.\nS:U - The corruption is confined to kernel heap objects and queues managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The same skb sits on two queues and is freed while still referenced, so hci_devcd_handle_pkt_skb() copies freed (potentially reallocated) heap memory into the dump buffer that dev_coredumpv() exports to userspace, and the UAF generally yields a read primitive over reallocated kernel objects.\nI:H - Double-linked-list corruption of dump_q/rx_q plus a double-free of the skb; heap-spraying the freed skb gives attacker-controlled next/prev pointers that skb_dequeue() unlinks, a classic arbitrary-write primitive.\nA:H - The documented result is an immediate kernel NULL pointer dereference oops in skb_dequeue() from the hci0 workqueue, plus double-free of the skb \u2014 a reliable kernel crash."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "2e8d44ebaa7babdd5c5ab50ca275826e241920d6", "versionType": "git"}, {"status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "b70b41591ec48c78ec6a885e1f57bfc4029e5e13", "versionType": "git"}, {"status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "8563d9fabd8a4b726ba7acab4737c438bf11a059", "versionType": "git"}, {"status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "lessThan": "0317b033abcd1d8dd2798f0e2de5e84543d0bd22", "versionType": "git"}], "programFiles": ["drivers/bluetooth/btusb.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"status": "unaffected", "version": "0", "lessThan": "6.4", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.90", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.28", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.14.6", "versionType": "semver", "lessThanOrEqual": "6.14.*"}, {"status": "unaffected", "version": "6.15", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/bluetooth/btusb.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/2e8d44ebaa7babdd5c5ab50ca275826e241920d6"}, {"url": "https://git.kernel.org/stable/c/b70b41591ec48c78ec6a885e1f57bfc4029e5e13"}, {"url": "https://git.kernel.org/stable/c/8563d9fabd8a4b726ba7acab4737c438bf11a059"}, {"url": "https://git.kernel.org/stable/c/0317b033abcd1d8dd2798f0e2de5e84543d0bd22"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()\n\nA NULL pointer dereference can occur in skb_dequeue() when processing a\nQCA firmware crash dump on WCN7851 (0489:e0f3).\n\n[ 93.672166] Bluetooth: hci0: ACL memdump size(589824)\n\n[ 93.672475] BUG: kernel NULL pointer dereference, address: 0000000000000008\n[ 93.672517] Workqueue: hci0 hci_devcd_rx [bluetooth]\n[ 93.672598] RIP: 0010:skb_dequeue+0x50/0x80\n\nThe issue stems from handle_dump_pkt_qca() returning 0 even when a dump\npacket is successfully processed. This is because it incorrectly\nforwards the return value of hci_devcd_init() (which returns 0 on\nsuccess). As a result, the caller (btusb_recv_acl_qca() or\nbtusb_recv_evt_qca()) assumes the packet was not handled and passes it\nto hci_recv_frame(), leading to premature kfree() of the skb.\n\nLater, hci_devcd_rx() attempts to dequeue the same skb from the dump\nqueue, resulting in a NULL pointer dereference.\n\nFix this by:\n1. Making handle_dump_pkt_qca() return 0 on success and negative errno\n on failure, consistent with kernel conventions.\n2. Splitting dump packet detection into separate functions for ACL\n and event packets for better structure and readability.\n\nThis ensures dump packets are properly identified and consumed, avoiding\ndouble handling and preventing NULL pointer access."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.90", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.28", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.14.6", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.15", "versionStartIncluding": "6.4"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:58:20.778Z"}}}, "cveMetadata": {"cveId": "CVE-2025-37918", "state": "PUBLISHED", "dateUpdated": "2026-10-15T21:52:03.622Z", "dateReserved": "2025-04-16T04:51:23.968Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-05-20T15:21:48.473Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/bluetooth/btusb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2e8d44ebaa7babdd5c5ab50ca275826e241920d6", "status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "versionType": "git"}, {"lessThan": "b70b41591ec48c78ec6a885e1f57bfc4029e5e13", "status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "versionType": "git"}, {"lessThan": "8563d9fabd8a4b726ba7acab4737c438bf11a059", "status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "versionType": "git"}, {"lessThan": "0317b033abcd1d8dd2798f0e2de5e84543d0bd22", "status": "affected", "version": "20981ce2d5a5f79d17da1ace3a93df7b3c6ba3d6", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/bluetooth/btusb.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.90", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.28", "versionType": "semver"}, {"lessThanOrEqual": "6.14.*", "status": "unaffected", "version": "6.14.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.15", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "30833BF6-1E57-4D3D-8FE2-832980842031", "versionEndExcluding": "6.6.90", "versionStartIncluding": "6.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5082CE19-0F3D-4521-AB3E-810D8255F500", "versionEndExcluding": "6.12.28", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "19E5095E-5950-43EA-8E78-FC860855293F", "versionEndExcluding": "6.14.6", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*", "matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*", "matchCriteriaId": "4C9D071F-B28E-46EC-AC61-22B913390211", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*", "matchCriteriaId": "13FC0DDE-E513-465E-9E81-515702D49B74", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*", "matchCriteriaId": "8C7B5B0E-4EEB-48F5-B4CF-0935A7633845", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()\n\nA NULL pointer dereference can occur in skb_dequeue() when processing a\nQCA firmware crash dump on WCN7851 (0489:e0f3).\n\n[ 93.672166] Bluetooth: hci0: ACL memdump size(589824)\n\n[ 93.672475] BUG: kernel NULL pointer dereference, address: 0000000000000008\n[ 93.672517] Workqueue: hci0 hci_devcd_rx [bluetooth]\n[ 93.672598] RIP: 0010:skb_dequeue+0x50/0x80\n\nThe issue stems from handle_dump_pkt_qca() returning 0 even when a dump\npacket is successfully processed. This is because it incorrectly\nforwards the return value of hci_devcd_init() (which returns 0 on\nsuccess). As a result, the caller (btusb_recv_acl_qca() or\nbtusb_recv_evt_qca()) assumes the packet was not handled and passes it\nto hci_recv_frame(), leading to premature kfree() of the skb.\n\nLater, hci_devcd_rx() attempts to dequeue the same skb from the dump\nqueue, resulting in a NULL pointer dereference.\n\nFix this by:\n1. Making handle_dump_pkt_qca() return 0 on success and negative errno\n on failure, consistent with kernel conventions.\n2. Splitting dump packet detection into separate functions for ACL\n and event packets for better structure and readability.\n\nThis ensures dump packets are properly identified and consumed, avoiding\ndouble handling and preventing NULL pointer access."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: btusb: evitar la desreferencia de puntero NULL en skb_dequeue() Una desreferencia de puntero NULL puede ocurrir en skb_dequeue() cuando se procesa un volcado de memoria de firmware QCA en WCN7851 (0489:e0f3). [ 93.672166] Bluetooth: hci0: tama\u00f1o de volcado de memoria ACL (589824) [ 93.672475] ERROR: Desreferencia de puntero nulo del kernel, direcci\u00f3n: 0000000000000008 [ 93.672517] Cola de trabajo: hci0 hci_devcd_rx [bluetooth] [ 93.672598] RIP: 0010:skb_dequeue+0x50/0x80. El problema se debe a que handle_dump_pkt_qca() devuelve 0 incluso cuando un paquete de volcado se procesa correctamente. Esto se debe a que reenv\u00eda incorrectamente el valor de retorno de hci_devcd_init() (que devuelve 0 en caso de \u00e9xito). Como resultado, el llamador (btusb_recv_acl_qca() o btusb_recv_evt_qca()) asume que el paquete no fue procesado y lo pasa a hci_recv_frame(), lo que provoca un kfree() prematuro del skb. Posteriormente, hci_devcd_rx() intenta retirar el mismo skb de la cola de volcado, lo que resulta en una desreferencia de puntero nulo. Para solucionar esto: 1. Hacer que handle_dump_pkt_qca() devuelva 0 en caso de \u00e9xito y errno negativo en caso de error, de acuerdo con las convenciones del kernel. 2. Dividir la detecci\u00f3n de paquetes de volcado en funciones independientes para ACL y paquetes de eventos para una mejor estructura y legibilidad. Esto garantiza que los paquetes de volcado se identifiquen y consuman correctamente, evitando el doble manejo y el acceso a punteros nulos."}], "id": "CVE-2025-37918", "lastModified": "2026-10-15T22:18:21.210", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-37918", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:46:03.552786Z", "version": "2.0.3"}}]}, "published": "2025-05-20T16:15:28.393", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0317b033abcd1d8dd2798f0e2de5e84543d0bd22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e8d44ebaa7babdd5c5ab50ca275826e241920d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8563d9fabd8a4b726ba7acab4737c438bf11a059"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b70b41591ec48c78ec6a885e1f57bfc4029e5e13"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: Bluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()", "id": "2367533", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2367533"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nBluetooth: btusb: avoid NULL pointer dereference in skb_dequeue()\nA NULL pointer dereference can occur in skb_dequeue() when processing a\nQCA firmware crash dump on WCN7851 (0489:e0f3).\n[ 93.672166] Bluetooth: hci0: ACL memdump size(589824)\n[ 93.672475] BUG: kernel NULL pointer dereference, address: 0000000000000008\n[ 93.672517] Workqueue: hci0 hci_devcd_rx [bluetooth]\n[ 93.672598] RIP: 0010:skb_dequeue+0x50/0x80\nThe issue stems from handle_dump_pkt_qca() returning 0 even when a dump\npacket is successfully processed. This is because it incorrectly\nforwards the return value of hci_devcd_init() (which returns 0 on\nsuccess). As a result, the caller (btusb_recv_acl_qca() or\nbtusb_recv_evt_qca()) assumes the packet was not handled and passes it\nto hci_recv_frame(), leading to premature kfree() of the skb.\nLater, hci_devcd_rx() attempts to dequeue the same skb from the dump\nqueue, resulting in a NULL pointer dereference.\nFix this by:\n1. Making handle_dump_pkt_qca() return 0 on success and negative errno\non failure, consistent with kernel conventions.\n2. Splitting dump packet detection into separate functions for ACL\nand event packets for better structure and readability.\nThis ensures dump packets are properly identified and consumed, avoiding\ndouble handling and preventing NULL pointer access."], "name": "CVE-2025-37918", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-20T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-37918\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-37918\nhttps://lore.kernel.org/linux-cve-announce/2025052001-CVE-2025-37918-db24@gregkh/T"], "statement": "A vulnerability was discovered in the btusb driver when processing QCA crash dump packets on WCN7851 chipsets. An incorrect return value caused certain packets to be handled twice, resulting in a NULL pointer dereference in skb_dequeue(). Local attackers with low privileges could trigger this condition to cause a kernel crash, leading to denial of service (DoS).", "threat_severity": "Moderate"}

{"created": "2025-06-27T09:26:51.315728+00:00", "updated": "2025-06-27T09:26:51.315786+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}